Ch2 Complete Test Bank The Components Of Matter

Chapter 2 Test Bank

The Components of Matter

1. Kaolinite, a clay mineral with the formula Al₄Si₄O₁₀(OH)₈, is used as a filler in slick-paper for magazines and as a raw material for ceramics. Analysis shows that 14.35 g of kaolinite contains 8.009 g of oxygen. Calculate the mass percent of oxygen in kaolinite.

A. 1.792 mass %

B. 24.80 mass %

C. 30.81 mass %

D. 34.12 mass %

E. 55.81 mass %Accessibility: Keyboard Navigation

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Difficulty: Easy

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Subtopic: Atomic Theories

Topic: Components of Matter

2. Compound 1 has a composition of 46.7 mass % of element A and 53.3 mass % of element B. A and B also form a second binary compound (compound 2). If the compositions of the two compounds are consistent with the law of multiple proportions, which of the following compositions could be that of compound 2?

A. 23.4 mass % A 76.6 mass % B

B. 30.4 mass % A 69.6 mass % B

C. 33.3 mass % A 66.7 mass % B

D. 53.3 mass % A 46.7 mass % B

E. 73.3 mass % A 26.7 mass % B

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Subtopic: Atomic Theories

Topic: Components of Matter

3. What are the approximate carbon:hydrogen mass ratios in methane (CH₄) and ethyne (C₂H₂)?

A. 1:4 and 1:1

B. 3:2 and 6:1

C. 3:1 and 12:1

D. 3:2 and 12:1

E. 3:1 and 6:1

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Subtopic: Atomic Theories

Topic: Components of Matter

4. J. J. Thomson studied cathode ray particles (electrons) and was able to measure the mass/charge ratio. His results showed that

A. the mass/charge ratio varied with as the cathode material was changed.

B. the charge was always a whole-number multiple of some minimum charge.

C. matter included particles much smaller than the atom.

D. atoms contained dense areas of positive charge.

E. atoms are largely empty space.

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Difficulty: Easy

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Subtopic: Structure of the Atom

Topic: Components of Matter

5. Who is credited with measuring the mass/charge ratio of the electron?

A. Dalton

B. Gay-Lussac

C. Thomson

D. Millikan

E. Rutherford

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Subtopic: Structure of the Atom

Topic: Components of Matter

6. Who is credited with first measuring the charge of the electron?

A. Dalton

B. Gay-Lussac

C. Thomson

D. Millikan

E. Rutherford

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Subtopic: Structure of the Atom

Topic: Components of Matter

7. Millikan's oil-drop experiment

A. established the charge on an electron.

B. showed that all oil drops carried the same charge.

C. provided support for the nuclear model of the atom.

D. suggested that some oil drops carried fractional numbers of electrons.

E. suggested the presence of a neutral particle in the atom.

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Subtopic: Structure of the Atom

Topic: Components of Matter

8. In a Millikan oil-drop experiment, the charges on several different oil drops were as follows:

–5.92; –4.44; –2.96; –8.88. The units are arbitrary. What is the likely value of the electronic charge in these arbitrary units?

A. –1.11

B. –1.48

C. –2.22

D. –2.96

E. –5.55

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Subtopic: Structure of the Atom

Topic: Components of Matter

9. Who is credited with discovering the atomic nucleus?

A. Dalton

B. Gay-Lussac

C. Thomson

D. Millikan

E. Rutherford

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Subtopic: Structure of the Atom

Topic: Components of Matter

10. Rutherford bombarded gold foil with alpha (α) particles and found that a small percentage of the particles were deflected. Which of the following was not accounted for by the model he proposed for the structure of atoms?

A. the small size of the nucleus

B. the charge on the nucleus

C. the total mass of the atom

D. the existence of protons

E. the presence of electrons outside the nucleus

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Subtopic: Structure of the Atom

Topic: Components of Matter

11. Which one of the following statements about atoms and subatomic particles is correct?

A. Rutherford discovered the atomic nucleus by bombarding gold foil with electrons.

B. The proton and the neutron have identical masses.

C. The neutron's mass is equal to that of a proton plus an electron.

D. A neutral atom contains equal numbers of protons and electrons.

E. An atomic nucleus contains equal numbers of protons and neutrons.

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Subtopic: Structure of the Atom

Topic: Components of Matter

12. The chemical symbol for potassium is

A. P.

B. Po.

C. Pt.

D. Pm.

E. K.

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Difficulty: Easy

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Subtopic: Atomic Number, Mass Number, Atomic Symbol, and Isotopes

Topic: Components of Matter

13. Which of the following symbols does not represent an element?

A. O₂

B. Co

C. HF

D. Cs

E. Xe

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Subtopic: Atomic Number, Mass Number, Atomic Symbol, and Isotopes

Topic: Components of Matter

14. When an atom is represented by the symbol , the value of A is the

A. number of neutrons in the atom.

B. number of protons in the atom.

C. atomic mass of the element.

D. total number of electrons and neutrons in the atom.

E. total number of protons and neutrons in the atom.

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Atomic Number, Mass Number, Atomic Symbol, and Isotopes

Topic: Components of Matter

15. An isotope of which of the following elements is chosen as a standard in measuring atomic mass?

A. carbon

B. oxygen

C. hydrogen

D. neon

E. helium

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Subtopic: Elements and the Periodic Table

Topic: Components of Matter

16. One amu is defined as

A. the mass of a proton.

B. 1/12 the mass of an atom of .

C. the mass of an atom of .

D. 1/20 the mass of an atom of .

E. 1/16 the mass of an atom of .

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Elements and the Periodic Table

Topic: Components of Matter

17. Bromine is the only nonmetal that is a liquid at room temperature. Consider the isotope bromine-81, . Select the combination which lists the correct atomic number, neutron number, and mass number, respectively.

A. 35, 46, 81

B. 35, 81, 46

C. 81, 46, 35

D. 46, 81, 35

E. 35, 81, 116

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Subtopic: Atomic Number, Mass Number, Atomic Symbol, and Isotopes

Topic: Components of Matter

18. Atoms X, Y, Z, and R have the following nuclear compositions: Which two are isotopes?

A. X & Y

B. X & R

C. Y & R

D. Z & R

E. X & Z

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Atomic Number, Mass Number, Atomic Symbol, and Isotopes

Topic: Components of Matter

19. Lithium forms compounds which are used in dry cells and storage batteries and in high-temperature lubricants. It has two naturally occurring isotopes, ⁶Li (isotopic mass = 6.015121 amu) and ⁷Li (isotopic mass = 7.016003 amu). Lithium has an atomic mass of 6.9409 amu. What is the percent abundance of lithium-6?

A. 92.50%

B. 86.66%

C. 46.16%

D. 7.503%

E. 6.080%

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Subtopic: Elements and the Periodic Table

Topic: Components of Matter

20. Silicon, which makes up about 25% of Earth's crust by mass, is used widely in the modern electronics industry. It has three naturally occurring isotopes, ²⁸Si, ²⁹Si, and ³⁰Si. Calculate the atomic mass of silicon.

A. 29.2252 amu

B. 28.9757 amu

C. 28.7260 amu

D. 28.0855 amu

E. 27.9801 amu

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Subtopic: Elements and the Periodic Table

Topic: Components of Matter

21. Bromine has two naturally-occurring isotopes. ⁷⁹Br has a mass of 78.9 amu and accounts for 50.3% of bromine atoms. If the atomic mass of bromine is 79.9 amu, what is the mass of an atom of the second bromine isotope?

A. 77.9 amu

B. 80.0 amu

C. 80.1 amu

D. 80.9 amu

E. 88.9 amu

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Subtopic: Elements and the Periodic Table

Topic: Components of Matter

22. In the modern periodic table, the order in which the elements are placed is based on

A. atomic mass.

B. mass number.

C. atomic number.

D. atomic size.

E. chemical reactivity.

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Subtopic: Elements and the Periodic Table

Topic: Components of Matter

23. Which of the following elements are the least reactive?

A. alkali metals

B. noble gases

C. halogens

D. alkaline earth metals

E. metalloids

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Subtopic: Elements and the Periodic Table

Topic: Components of Matter

24. Which of the following is a nonmetal?

A. lithium, Li, Z = 3

B. bromine, Br, Z = 35

C. mercury, Hg, Z = 80

D. bismuth, Bi, Z = 83

E. sodium, Na, Z = 11

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Subtopic: Elements and the Periodic Table

Topic: Components of Matter

25. Which of the following is a metal?

A. nitrogen, N, Z = 7

B. phosphorus, P, Z = 15

C. arsenic, Z = 33

D. thallium, Tl, Z = 81

E. silicon, Si, Z = 14

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Subtopic: Elements and the Periodic Table

Topic: Components of Matter

26. Which of the following is a metalloid?

A. carbon, C, Z = 6

B. sulfur, S, Z = 16

C. germanium, Ge, Z = 32

D. iridium, Z = 77

E. bromine, Br, Z = 35

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Subtopic: Elements and the Periodic Table

Topic: Components of Matter

27. Which one of the following groups does not contain any metals?

A. C, S, As, H

B. Cu, P, Se, Kr

C. N, Ne, Nd, Np

D. Xe, Hg, Ge, O

E. Cl, Al, Si, Ar

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Subtopic: Elements and the Periodic Table

Topic: Components of Matter

28. A column of the periodic table is called a

A. group.

B. period.

C. isotopic mixture.

D. pillar.

E. shell.

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Subtopic: Elements and the Periodic Table

Topic: Components of Matter

29. A row of the periodic table is called a

A. group.

B. period.

C. isotopic mixture.

D. family.

E. subshell.

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Subtopic: Elements and the Periodic Table

Topic: Components of Matter

30. What is the chemical symbol for the group 6A (16) element that lies in period 4?

A. Cr

B. Hf

C. W

D. Ti

E. Se

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Subtopic: Elements and the Periodic Table

Topic: Components of Matter

31. Which of the following compounds is ionic?

A. PF₃

B. CS₂

C. HCl

D. SO₂

E. MgCl₂

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Difficulty: Medium

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Subtopic: Molecules and Ions

Topic: Components of Matter

32. After an atom has lost an electron it becomes a/an ______ and has a _______ charge.

A. anion, positive

B. isotope, negative

C. anion, negative

D. cation, positive

E. nucleus, positive

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Subtopic: Molecules and Ions

Topic: Components of Matter

33. Which of the following ions occurs commonly?

A. N³⁺

B. S⁶⁺

C. O^2–

D. Ca⁺

E. Cl⁺

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Subtopic: Molecules and Ions

Topic: Components of Matter

34. Which of the following ions occurs commonly?

A. P³⁺

B. Br⁷⁺

C. O⁶⁺

D. Ca²⁺

E. K^–

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Subtopic: Molecules and Ions

Topic: Components of Matter

35. Which of the following compounds is covalent?

A. CaCl₂

B. MgO

C. Al₂O₃

D. Cs₂S

E. PCl₃

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Subtopic: Molecules and Ions

Topic: Components of Matter

36. Select the incorrect statement about elements and compounds.

A. All ionic compounds are neutral.

B. Some elements exist as molecules.

C. The bonding in compounds may be covalent or ionic.

D. The molecular formula of a compound provides more information than the structural formula.

E. Among the elements, there are more metals than nonmetals.

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Subtopic: Molecules and Ions

Topic: Components of Matter

37. Which, if any, of the following elements do not occur in the major classes of organic compounds?

A. H

B. C

C. N

D. O

E. All of these choices are correct.

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Subtopic: Molecules and Ions

Topic: Components of Matter

38. Which of the following is the empirical formula for hexane, C₆H₁₄?

A. C₁₂H₂₈

B. C₆H₁₄

C. C₃H₇

D. CH_2.3

E. C_0.43H

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Difficulty: Easy

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Subtopic: Chemical Formulas

Topic: Components of Matter

39. Sodium oxide combines violently with water. Which of the following gives the formula and the bonding for sodium oxide?

A. NaO, ionic compound

B. NaO, covalent compound

C. Na₂O, ionic compound

D. Na₂O, covalent compound

E. Na₂O₂, ionic compound

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Subtopic: Chemical Formulas

Topic: Components of Matter

40. Barium fluoride is used in embalming and in glass manufacturing. Which of the following gives the formula and bonding for barium fluoride?

A. BaF₂, ionic compound

B. BaF₂, covalent compound

C. BaF, ionic compound

D. BaF, covalent compound

E. Ba₂F, ionic compound

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Subtopic: Chemical Formulas

Topic: Components of Matter

41. The colorless substance, MgF₂, is used in the ceramics and glass industry. What is its name?

A. magnesium difluoride

B. magnesium fluoride

C. magnesium(II) fluoride

D. monomagnesium difluoride

E. None of these choices are correct

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Subtopic: Nomenclature

Topic: Components of Matter

42. The compound, BaO, absorbs water and carbon dioxide readily and is used to dry gases and organic solvents. What is its name?

A. barium oxide

B. barium(II) oxide

C. barium monoxide

D. baric oxide

E. barium peroxide

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Subtopic: Nomenclature

Topic: Components of Matter

43. What is the name of Na₂O?

A. disodium monoxide

B. sodium monoxide

C. sodium dioxide

D. sodium(I) oxide

E. sodium oxide

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Subtopic: Nomenclature

Topic: Components of Matter

44. The substance, CaSe, is used in materials which are electron emitters. What is its name?

A. calcium monoselenide

B. calcium(II) selenide

C. calcium selenide

D. calcium(I) selenide

E. calcium(II) selenium

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Topic: Components of Matter

45. The substance, CoCl₂, is useful as a humidity indicator because it changes from pale blue to pink as it gains water from moist air. What is its name?

A. cobalt dichloride

B. cobalt(II) chloride

C. cobalt chloride

D. cobaltic chloride

E. copper(II) chloride

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Subtopic: Nomenclature

Topic: Components of Matter

46. In the ionic compound with the general formula M₂ X₃, the likely charge on X is

A. +1.

B. +3.

C. –1.

D. –2.

E. –3.

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Subtopic: Chemical Formulas

Topic: Components of Matter

47. Which one of the following combinations of names and formulas of ions is incorrect?

A. O₂^– oxide

B. Al³⁺ aluminum

C. NO₃^– nitrate

D. PO₄^3– phosphate

E. CrO₄^2– chromate

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Subtopic: Molecules and Ions

Topic: Components of Matter

48. Which one of the following is a polyatomic cation?

A. nitrate

B. chromate

C. permanganate

D. hydronium

E. potassium

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Subtopic: Molecules and Ions

Topic: Components of Matter

49. Which one of the following combinations of names and formulas of ions is incorrect?

A. O^2– oxide

B. Cd²⁺ cadmium

C. ClO₃^– chlorate

D. HCO₃^– hydrogen carbonate

E. NO₂^– nitrate

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Subtopic: Molecules and Ions

Topic: Components of Matter

50. Which one of the following combinations of names and formulas of ions is incorrect?

A. Ba²⁺ barium

B. S^2– sulfate

C. CN^– cyanide

D. ClO₄^– perchlorate

E. HCO₃^– bicarbonate

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Subtopic: Molecules and Ions

Topic: Components of Matter

51. Which one of the following combinations of names and formulas of ions is incorrect?

A. NH₄⁺ ammonium

B. S^2– sulfide

C. CN^– cyanide

D. S₂O₃^2– thiosulfate

E. ClO₃^– perchlorate

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Subtopic: Molecules and Ions

Topic: Components of Matter

52. A red glaze on porcelain can be produced by using MnSO₄. What is its name?

A. manganese disulfate

B. manganese(II) sulfate

C. manganese(IV) sulfate

D. manganese sulfate

E. manganese(I) sulfate

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Subtopic: Nomenclature

Topic: Components of Matter

53. The compound, (NH₄)₂S, can be used in analysis for trace amounts of metals present in a sample. What is its name?

A. ammonium sulfide

B. diammonium sulfide

C. ammonium sulfite

D. ammonia(I) sulfite

E. ammonium(I) sulfide

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Topic: Components of Matter

54. The substance, KClO₃, is a strong oxidizer used in explosives, fireworks, and matches. What is its name?

A. potassium chlorite

B. potassium chloride

C. potassium(I) chlorite

D. potassium(I) chlorate

E. potassium chlorate

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Topic: Components of Matter

55. The compound, NaH₂PO₄, is present in many baking powders. What is its name?

A. sodium biphosphate

B. sodium hydrogen phosphate

C. sodium dihydrogen phosphate

D. sodium hydrophosphate

E. sodium dihydride phosphate

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56. Zinc acetate is used in preserving wood and in manufacturing glazes for porcelain. What is its formula?

A. ZnAc₂

B. ZnCH₃COO

C. Zn(CH₃COO)₂

D. Zn₂CH₃COO

E. ZnCH₃COCH₃

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57. Silver chloride is used in photographic emulsions. What is its formula?

A. Ag₂Cl₃

B. Ag₂Cl

C. AgCl₃

D. AgCl₂

E. AgCl

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Topic: Components of Matter

58. Barium sulfate is used in manufacturing photographic paper. What is its formula?

A. BaSO₄

B. Ba(SO₄)₂

C. Ba₂SO₄

D. Ba₂(SO₄)₃

E. BaSO₃

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Topic: Components of Matter

59. Sodium peroxide is an oxidizer used to bleach animal and vegetable fibers. What is its formula?

A. NaO

B. NaO₂

C. Na₂O₂

D. Na₂O

E. NaH₂O₂

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Topic: Components of Matter

60. What is the formula for magnesium sulfide?

A. MgS

B. MgS₂

C. Mg₂S

D. Mg₂S₃

E. MgSO₄

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61. Ferric oxide is used as a pigment in metal polishing. Which of the following is its formula?

A. FeO

B. Fe₂O

C. FeO₃

D. Fe₂O₅

E. Fe₂O₃

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62. What is the formula for lead (II) oxide?

A. PbO

B. PbO₂

C. Pb₂O

D. PbO₄

E. Pb₂O₃

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Topic: Components of Matter

63. Potassium permanganate is a strong oxidizer that reacts explosively with easily oxidized materials. What is its formula?

A. KMnO₃

B. KMnO₄

C. K₂MnO₄

D. K(MnO₄)₂

E. K₂Mn₂O₇

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Topic: Components of Matter

64. Calcium hydroxide is used in mortar, plaster, and cement. What is its formula?

A. CaOH

B. CaOH₂

C. Ca₂OH

D. Ca(OH)₂

E. CaHO₂

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Topic: Components of Matter

65. What is the formula for lithium nitrite?

A. LiNO₂

B. Li₂NO₂

C. LiNO₃

D. Li₂NO₃

E. LiNO₄

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Topic: Components of Matter

66. Iron (III) chloride hexahydrate is used as a coagulant for sewage and industrial wastes. What is its formula?

A. Fe(Cl·6H₂O)₃

B. Fe₃Cl·6H₂O

C. FeCl₃(H₂O)₆

D. Fe₃Cl(H₂O)₆

E. FeCl₃·6H₂O

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Topic: Components of Matter

67. Which one of the following formulas of ionic compounds is the least likely to be correct?

A. NH₄Cl

B. Ba(OH)₂

C. Na₂SO₄

D. Ca₂NO₃

E. Cu(CN)₂

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Topic: Components of Matter

68. Which one of the following formulas of ionic compounds is the least likely to be correct?

A. CaCl₂

B. NaSO₄

C. MgCO₃

D. KF

E. Cu(NO₃)₂

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Topic: Components of Matter

69. What is the name of the acid formed when H₂S gas is dissolved in water?

A. sulfuric acid

B. sulfurous acid

C. hydrosulfuric acid

D. hydrosulfurous acid

E. sulfidic acid

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Nomenclature

Topic: Components of Matter

70. What is the name of the acid formed when HBr gas is dissolved in water?

A. bromic acid

B. bromous acid

C. hydrobromic acid

D. hydrobromous acid

E. hydrobromidic acid

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Nomenclature

Topic: Components of Matter

71. What is the name of the acid formed when HClO₄ liquid is dissolved in water?

A. hydrochloric acid

B. perchloric acid

C. chloric acid

D. chlorous acid

E. hydrochlorate acid

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Nomenclature

Topic: Components of Matter

72. What is the name of the acid formed when HCN gas is dissolved in water?

A. cyanic acid

B. hydrocyanic acid

C. cyanous acid

D. hydrocyanous acid

E. hydrogen cyanide

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Nomenclature

Topic: Components of Matter

73. The name for HF(g) is

A. hydrofluoric acid.

B. hydrogen(I) fluoride.

C. hydrogen fluoride.

D. hydrogen fluorine.

E. fluoric acid.

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Nomenclature

Topic: Components of Matter

74. Which one of the following combinations of names and formulas is incorrect?

A. H₃PO₄ phosphoric acid

B. HNO₃ nitric acid

C. NaHCO₃ sodium carbonate

D. H₂CO₃ carbonic acid

E. KOH potassium hydroxide

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Nomenclature

Topic: Components of Matter

75. What is the name of PCl₃?

A. phosphorus chloride

B. phosphoric chloride

C. phosphorus trichlorate

D. trichlorophosphide

E. phosphorus trichloride

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Nomenclature

Topic: Components of Matter

76. The compound, P₄S₁₀, is used in the manufacture of safety matches. What is its name?

A. phosphorus sulfide

B. phosphoric sulfide

C. phosphorus decasulfide

D. tetraphosphorus decasulfide

E. phosphorus pentasulfide

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Nomenclature

Topic: Components of Matter

77. What is the name of BBr₃?

A. boron bromide

B. boric bromide

C. boron tribromide

D. tribromoboride

E. bromine triboride

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Nomenclature

Topic: Components of Matter

78. What is the name of IF₇?

A. iodine fluoride

B. iodic fluoride

C. iodine heptafluoride

D. heptafluoroiodide

E. heptafluorine iodide

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Nomenclature

Topic: Components of Matter

79. What is the name of P₄Se₃?

A. phosphorus selenide

B. phosphorus triselenide

C. tetraphosphorus selenide

D. phosphoric selenide

E. tetraphosphorus triselenide

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Nomenclature

Topic: Components of Matter

80. Diiodine pentaoxide is used as an oxidizing agent that converts carbon monoxide to carbon dioxide. What is its chemical formula?

A. I₂O₅

B. IO₅

C. 2IO₅

D. I₅O₂

E. (IO₅)₂

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Nomenclature

Topic: Components of Matter

81. Tetrasulfur dinitride decomposes explosively when heated. What is its formula?

A. S₂N₄

B. S₄N₂

C. 4SN₂

D. S₄N

E. S₂N

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Nomenclature

Topic: Components of Matter

82. Chlorine dioxide is a strong oxidizer that is used for bleaching flour and textiles and for purification of water. What is its formula?

A. (ClO)₂

B. Cl₂O

C. Cl₂O₂

D. Cl₂O₄

E. ClO₂

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Nomenclature

Topic: Components of Matter

83. The formula of heptane is

A. C₆H₁₂.

B. C₆H₁₄.

C. C₇H₁₄.

D. C₇H₁₆.

E. C₈H₁₆.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Medium

Gradable: automatic

Subtopic: Nomenclature

Topic: Components of Matter

84. Ammonium sulfate, (NH₄)₂SO₄, is a fertilizer widely used as a source of nitrogen. Calculate its molecular mass.

A. 63.07 amu

B. 114.10 amu

C. 118.13 amu

D. 128.11 amu

E. 132.13 amu

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Chemical Formulas

Topic: Components of Matter

85. Sodium chromate is used to protect iron from corrosion and rusting. Determine its molecular mass.

A. 261.97 amu

B. 238.98 amu

C. 161.97 amu

D. 138.98 amu

E. 74.99 amu

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Chemical Formulas

Topic: Components of Matter

86. Iodine pentafluoride reacts slowly with glass and violently with water. Determine its molecular mass.

A. 653.52 amu

B. 259.89 amu

C. 221.90 amu

D. 202.90 amu

E. 145.90 amu

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Chemical Formulas

Topic: Components of Matter

87. Determine the molecular mass of iron (III) bromide hexahydrate, a substance used as a catalyst in organic reactions.

A. 403.65 amu

B. 355.54 amu

C. 317.61 amu

D. 313.57 amu

E. 295.56 amu

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Chemical Formulas

Topic: Components of Matter

88. For each of the following elements, indicate whether it is a metal, a nonmetal, or a metalloid:

a. S

nonmetal

b. Ge

metalloid

c. Hg

metal

d. H

nonmetal

e. I

nonmetal

f. Si

metalloid

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Elements and the Periodic Table

Topic: Components of Matter

89. In nature, some elements exist as molecules, while others do not.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Elements and the Periodic Table

Topic: Components of Matter

90. Modern studies have shown that the Law of Multiple Proportions is not valid.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Medium

Gradable: automatic

Subtopic: Atomic Theories

Topic: Components of Matter

91. Atoms of one element cannot be converted to another element by any known method.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Atomic Theories

Topic: Components of Matter

92. The mass of a neutron is equal to the mass of a proton plus the mass of an electron.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Structure of the Atom

Topic: Components of Matter

93. All neutral atoms of tin have 50 protons and 50 electrons.

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Structure of the Atom

Topic: Components of Matter

94. Copper (Cu) is a transition metal.

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Elements and the Periodic Table

Topic: Components of Matter

95. Lead (Pb) is a main-group element.

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Elements and the Periodic Table

Topic: Components of Matter

96. Ionic compounds may carry a net positive or negative charge.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Molecules and Ions

Topic: Components of Matter

97. When an alkali metal combines with a non-metal, a covalent bond is normally formed.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Molecules and Ions

Topic: Components of Matter

98. The molecular formula of a compound provides more information than its structural formula.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Chemical Formulas

Topic: Components of Matter

99. The formula C₉H₂₀ is an empirical formula.

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Chemical Formulas

Topic: Components of Matter

100. Which of the following sets are isoelectronic (i.e., have the same number of electrons)?

i. Br^-, Kr, Sr²⁺

ii. C, N^-, O^2-

iii. Mg²⁺, Ca²⁺, Sr²⁺

iv. O^2-, O, O²⁺

v. Ag⁺, Cd²⁺, Pd

A. i and ii

B. i and v

C. i, iii and iv

D. ii, iii and v

E. i, iii iv and v

Accessibility: Keyboard Navigation

Bloom's: 2. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Atomic Number, Mass Number, Atomic Symbol, and Isotopes

Topic: Components of Matter

101. For the element bromine, the symbol, group number, group name and physical state are, respectively

A. Bo, 17, noble gas, gas.

B. B, 13, semimetal, solid.

C. Br, 17, halogen, liquid.

D. Br, 17, halogen, gas.

E. Br, 15, chalcogenide, gas.

Accessibility: Keyboard Navigation

Bloom's: 2. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Atomic Number, Mass Number, Atomic Symbol, and Isotopes

Topic: Components of Matter

102. Which of the following has the most metallic character?

A. Ge

B. In

C. O

D. P

E. Sb

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Elements and the Periodic Table

Topic: Components of Matter

Category # of Questions

Accessibility: Keyboard Navigation 99

Bloom's: 1. Remember 32

Bloom's: 2. Apply 2

Bloom's: 2. Understand 23

Bloom's: 3. Apply 45

Difficulty: Easy 40

Difficulty: Hard 1

Difficulty: Medium 61

Gradable: automatic 102

Subtopic: Atomic Number, Mass Number, Atomic Symbol, and Isotopes 7

Subtopic: Atomic Theories 5

Subtopic: Chemical Formulas 12

Subtopic: Elements and the Periodic Table 19

Subtopic: Molecules and Ions 14

Subtopic: Nomenclature 35

Subtopic: Structure of the Atom 10

Topic: Components of Matter 102