1. Raymond Chang 10th edition Chapter 2
Chemistry
Raymond Chang
10th edition
Chapter 2
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2. Question 1
The nucleus of an atom is positively charged due to the neutrons present.
A) True
B) False

3. Question 2 Most of the mass of an atom is contained in the nucleus.
A) True
B) False

4. Question 3
The atomic number of an neutral atom is the same as the number of protons or electrons.
A) True
B) False

5. Question 4
Which of the following combinations of protons (p), neutrons (n), and electrons (e),
respectively, is possible for a neutral carbon atom?
A) 6p, 5n, 7e
B) 12p, 6n, 6e
C) 6p, 7n, 6e
D) 6p, 7n, 7e

6. Question 5
Which of the following combinations of protons (p), neutrons (n), and electrons (e),
respectively, is possible for a chloride ion?
A) 17p, 18n, 17e
B) 17p, 20n, 18e
C) 16p, 19n, 17e
D) All are possible for a chloride ion

7. Question 6
Which of the following list a metal, a nonmetal, and a noble gas, respectively?
A) Au, P, Ne
B) Ne, Ar, Cl
C) Au, Pt, He
D) Au, P, H

8. Question 7
What is the empirical formula of a compound that contains molecules composed of 3
carbon atoms and 6 hydrogen atoms?
A) CH2
B) C2H4
C) C3H6
D) All of the above

9. Question 8 The compound dinitrogen monoxide could be classified as
A) a molecular compound.
B) an ionic compound.
C) a binary compound.
D) A or C.

10. Question 9
Which of the following chemical names could refer to more than one common compound?
A) calcium hydroxide
B) copper chloride
C) sodium sulfide
D) lithium nitrate

11. Question 10 Which of the following formulas refers to the sulfate ion?
A) SO42-
B) SO4
C) SO32-
D) SO3

12. Question 11 The law of definite proportions was published by
A) Dalton.
B) Proust.
C) Einstein.
D) Thomson.
E) Millikan.

13. Question 12
Which of the following is not an elementary subatomic particle?
A) Neutron
B) Proton
C) Electron
D) a particle
E) b particle

14. Question 13 Which of the following statements is false ?
A) A neutron is about 1840 times heavier than an electron
B) An electron is about 1840 times lighter than a proton
C) A proton has the same charge magnitude as an electron
D) A neutron has about the same mass as a proton
E) All the charge of an atom is concentrated in its nucleus

15. Question 14
Which is the appropriate symbol for an isotope with Z = 75 and A = 187? A) B) C) D) E)

16. Question 15
Which of the following is not the common name of a group of elements in the Periodic
Table?
A) alkali metals
B) transition metals
C) halogens
D) inert gases
E) alkali earth metals

17. Question 16 The species Hg22+ is an example of A) a monoatomic cation.
B) a polyatomic cation.
C) a monoatomic anion.
D) a polyatomic anion.
E) a polyatomic metal.

18. Question 17 What is the name of Cr2(Cr2O7)3?
A) chromium (II) dichromate
B) chromium (II) trichromate
C) chromium (III) heptoxide
D) chromium (III) heptaoxide
E) chromium (III) dichromate

19. Question 18
Which of the following represents the salt cobaltic thiocyanate?
A) Co(CN)2
B) Co(SCN)2
C) Co(CN)3
D) Co(SCN)3
E) none of the above

20. Question 19
Which of the following formulas does not represent a real compound?
A) CuOH
B) MnO2
C) Al2(HPO4)3
D) (NH4)2Cr2O7
E) NaCO3

21. Question 20
Which of the following is most similar in properties to cupric sulfate?
A) CuSO3
B) Cu2SO3
C) Cu2SO4
D) CuSO4 • 5 H2O
E) CuS

22. Answer Key – Chapter 2 B A C D B D E C