Chemistry: Molecular Nature of Matter and Change, 6th Edition (Silberberg)

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1			Select the incorrect statement about elements, compounds and mixtures.
			A)	Elements consist of atoms of the same kind.
			B)	Compounds contain two or more elements, chemically combined.
			C)	The properties of a compound are different from those of its constituent elements.
			D)	A mixture is an example of what is meant by the term "substance".
			E)	Both elements and compounds may exist as molecules.
2			A compound of sulfur and oxygen is 50.0% sulfur, 50.0% oxygen by weight. Sulfur and oxygen form another compound, in accordance with the law of multiple proportions. Which of the following is a likely composition for the second compound?
			A)	85.0 mass % sulfur 15.0 mass % oxygen.
			B)	65.0 mass % sulfur 35.0 mass % oxygen.
			C)	55.0 mass % sulfur 45.0 mass % oxygen.
			D)	45.0 mass % sulfur 55.0 mass % oxygen.
			E)	40.0 mass % sulfur 60.0 mass % oxygen.
3			Rutherford's experiment with alpha particle scattering by gold foil established that
			A)	electrons have a negative charge.
			B)	protons are 1840 times heavier than electrons.
			C)	protons are not evenly distributed throughout an atom.
			D)	atoms are made of protons, neutrons and electrons.
			E)	the nucleus contains protons and neutrons.
4			The number of neutrons in an atom of <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0310402656/37547/Image6.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a> is
			A)	53
			B)	74
			C)	126
			D)	127
			E)	180
5			The ion <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0310402656/37547/Image7.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a> has
			A)	18 electrons, 18 protons, 21 neutrons
			B)	19 electrons, 18 protons, 20 neutrons
			C)	18 electrons, 19 protons, 20 neutrons
			D)	19 electrons, 19 protons, 39 neutrons
			E)	18 electrons, 19 protons, 19 neutrons
6			Which of the following sets are isoelectronic (i.e., have the same number of electrons)? i. Br-, Kr, Sr2+ ii. C, N-, O2- iii. Mg2+, Ca2+, Sr2+ iv. O2-, 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
7			The element antimony has an atomic weight of 121.757 amu and only two naturally occurring isotopes. One isotope has an abundance of 57.3% and an isotopic mass of 120.904 amu. What is the mass of the other isotope?
			A)	52.479 amu
			B)	121.757 amu
			C)	122.393 amu
			D)	122.610 amu
			E)	122.902 amu
8			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.
9			The hydride ion, H-, occurs in compounds of hydrogen with
			A)	alkali metals.
			B)	halogens.
			C)	chalcogenides.
			D)	non-metals.
			E)	oxygen.
10			Which of the following pairs of elements would be most likely to form an ionic compound?
			A)	P and Br
			B)	Zn and K
			C)	C and O
			D)	Al and Rb
			E)	F and Ca
11			What is the name of NaI?
			A)	sodium iodide
			B)	sodium(I) iodide
			C)	sodium monoiodide
			D)	sodious iodide
			E)	sodium iodine
12			Which 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
13			The correct name of the compound N2O4 is
			A)	nitric oxide.
			B)	dinitrogen oxide.
			C)	dinitrogen tetraoxide.
			D)	nitrous oxide.
			E)	nitrogen dioxide.
14			The name for HIO3 is
			A)	hydroiodic acid.
			B)	iodic acid.
			C)	periodic acid.
			D)	hypoiodic acid.
			E)	hydrogen iodide.
15			Which one of the following combinations of names and formulas of ions is incorrect?
			A)	O2- oxide
			B)	Al3+ aluminum
			C)	NO3- nitrate
			D)	PO43- phosphate
			E)	CrO42- chromate