Raymond Chang 11th edition Chapter 2 Chemistry Raymond Chang 11th edition Chapter 2 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Question 1 The nucleus of an atom is positively charged due to the neutrons present. A) True B) False

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

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

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

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

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

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

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.

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

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

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

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

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

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

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

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.

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

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

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

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

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