MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

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1 Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) A molecule of water contains hydrogen and oxygen in a 1:8 ratio by mass. This is a statement of. A) the law of multiple proportions B) the law of conservation of mass C) the law of constant composition D) the law of conservation of energy E) none of the above 1) 2) Which pair of substances could be used to illustrate the law of multiple proportions? A) CO, CO 2 B) NaCl, KCl C) SO 2, H 2 SO 4 D) H 2 O, O 2 E) CH 4, C 6 H 12 O 6 2) 3) The charge on an electron was determined in the. A) Millikan oil drop experiment B) cathode ray tube, by J. J. Thomson C) atomic theory of matter D) Rutherford gold foil experiment E) Dalton atomic theory 3) 4) Which combination of protons, neutrons, and electrons is correct for the isotope of copper, Cu? A) 34 p +, 29 n, 34 e - B) 63 p +, 29 n, 63 e - C) 34 p +, 34 n, 29 e - D) 29 p +, 29 n, 63 e - E) 29 p +, 34 n, 29 e - 5) Which pair of atoms constitutes a pair of isotopes of the same element? A) 17 9 X 17 8 X B) 14 6 X 14 7 X C) X X D) X 19 9 X E) 14 6 X 12 6 X 4) 5) 1

2 6) Different isotopes of a particular element contain the same number of. A) protons B) subatomic particles C) neutrons D) protons, neutrons, and electrons E) protons and neutrons 6) 7) Which one of the following basic forces is so small that it has no chemical significance? A) strong nuclear force B) weak nuclear force C) gravity D) electromagnetism E) Coulomb's law 7) 8) Silver has two naturally occurring isotopes with the following isotopic masses: 8) 107 Ar Ar The average atomic mass of silver is amu. The fractional abundance of the lighter of the two isotopes is. A) B) C) D) E) ) The element X has three naturally occurring isotopes. The masses (amu) and % abundances of the isotopes are given in the table below. The average atomic mass of the element is amu. 9) Isotope Abundance Mass 221 X X X A) B) C) D) E) ) The average atomic weight of copper, which has two naturally occurring isotopes, is One of the isotopes has an atomic weight of 62.9 amu and constitutes 69.1% of the copper isotopes. The other isotope has an abundance of 30.9%. The atomic weight (amu) of the second isotope is amu. A) 63.2 B) 63.8 C) 28.1 D) 64.1 E) ) 11) An unknown element is found to have three naturally occurring isotopes with atomic masses of (0.337%), (0.063%), and (99.600%). Which of the following is the unknown element? A) K B) Ar C) Ca D) Cl E) None of the above could be the unknown element. 11) 2

3 12) Which pair of elements would you expect to exhibit the greatest similarity in their physical and chemical properties? A) Cs, Ba B) Ca, Sr C) Ga, Ge D) H, Li E) C, O 12) 13) An element in the upper right corner of the periodic table. A) is either a metal or metalloid B) is definitely a metalloid C) is either a metalloid or a nonmetal D) is definitely a nonmetal E) is definitely a metal 13) 14) Which one of the following molecular formulas is also an empirical formula? A) C 2 H 6 SO B) C 6 H 6 O 2 C) H 2 O 2 D) C 6 H 6 E) H 2 P 4 O 6 14) 15) Of the choices below, which one is not an ionic compound? A) RbCl B) PCl 5 C) MoCl 6 D) NaCl E) PbCl 2 15) 16) Which type of formula provides the most information about a compound? A) simplest B) chemical C) empirical D) structural E) molecular 16) 17) A molecular formula always indicates. A) the geometry of a molecule B) which atoms are attached to which in a molecule C) the isotope of each element in a compound D) how many of each atom are in a molecule E) the simplest whole-number ratio of different atoms in a compound 17) 18) Which pair of elements is most apt to form an ionic compound with each other? A) barium, bromine B) nitrogen, hydrogen C) oxygen, fluorine D) sulfur, fluorine E) calcium, sodium 18) 19) Which pair of elements is most apt to form a molecular compound with each other? A) aluminum, oxygen B) barium, bromine C) potassium, lithium D) magnesium, iodine E) sulfur, fluorine 19) 20) Which species below is the nitride ion? A) N 3- B) NO 2 - C) NO 3 - D) NH 4 + E) Na + 20) 3

4 21) Aluminum reacts with a certain nonmetallic element to form a compound with the general formula Al 2 X 3. Element X must be from Group of the Periodic Table of Elements. A) 6A B) 3A C) 4A D) 7A E) 5A 22) Which formula/name pair is incorrect? A) Mn(NO 3 ) 2 manganese(ii) nitrate B) Mg 3 N 2 magnesium nitrite C) Mg(MnO 4 ) 2 magnesium permanganate D) Mn(NO 2 ) 2 manganese(ii) nitrite E) Mg(NO 3 ) 2 magnesium nitrate 21) 22) 23) Which formula/name pair is incorrect? A) FeS iron(ii) sulfide B) Fe 2 (SO 3 ) 3 iron(iii) sulfite C) FeSO 3 iron(ii) sulfite D) FeSO 4 iron(ii) sulfate E) Fe 2 (SO 4 ) 3 iron(iii) sulfide 23) 24) Which one of the following is the formula of hydrochloric acid? A) HClO B) HCl C) HClO 2 D) HClO 4 E) HClO 3 24) 25) The suffix -ide is used primarily. A) for monoatomic cations B) for the name of the first element in a molecular compound C) for monatomic anion names D) for polyatomic cation names E) to indicate binary acids 25) 26) Which one of the following compounds is chromium(iii) oxide? A) Cr 3 O B) Cr 2 O 3 C) Cr 3 O 2 D) CrO 3 E) Cr 2 O 4 26) 27) Which one of the following compounds is copper(i) chloride? A) Cu 2 Cl B) CuCl 2 C) Cu 2 Cl 3 D) CuCl E) Cu 3 Cl 2 27) 28) The correct name for NaHCO 3 is. A) persodium hydroxide B) sodium bicarbonate C) sodium hydride D) carbonic acid E) persodium carbonate 28) 4

5 29) The correct name for HNO 2 is. A) hyponitrous acid B) hydrogen nitrate C) nitrous acid D) nitric acid E) pernitric acid 30) A correct name for Fe(NO 3 ) 2 is. A) ferric nitrite B) ferric nitrate C) ferrous nitrite D) iron nitrite E) ferrous nitrate 29) 30) 31) The proper formula for the hydronium ion is. A) H 3 O + B) H - C) OH - D) NH 4 + E) N 3-31) 32) Which one of the following polyatomic ions has the same charge as the hydroxide ion? A) nitrate B) carbonate C) phosphate D) ammonium E) sulfate 32) 33) Which metal does not form cations of differing charges? A) Sn B) Cu C) Co D) Na E) Fe 33) 34) Which metal forms cations of differing charges? A) Al B) Ba C) Sn D) K E) Cs 34) 35) The correct name for Ni(CN) 2 is. A) nickel (II) cyanide B) nickel cyanate C) nickel carbonate D) nickel (I) nitride E) nickel (I) cyanide 36) The formula for the compound formed between aluminum ions and phosphate ions is. A) Al(PO 4 ) 3 35) 36) B) AlPO 4 C) AlP D) Al 2 (PO 4 ) 3 E) Al 3 (PO 4 ) 3 5

6 Answer Key Testname: CHAPTER 2 DRAFT 1) C 2) A 3) A 4) E 5) E 6) A 7) C 8) D 9) D 10) E 11) B 12) B 13) D 14) A 15) B 16) D 17) D 18) A 19) E 20) A 21) A 22) B 23) E 24) B 25) C 26) B 27) D 28) B 29) C 30) E 31) A 32) A 33) D 34) C 35) A 36) B 6

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