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

Please note that this quiz uses special characters. Not all browsers display special characters properly. For best results please use Internet Explorer 5.5 or newer.

1			Methane is a compound which is 75% carbon, by mass, the balance being hydrogen. If a sample of methane weighs 24 g, what mass of hydrogen does it contain?
			A)	2.0 g
			B)	4.0 g
			C)	6.0 g
			D)	8.0 g
			E)	18.0 g
2			Which of the following ideas was not part of Dalton's atomic theory postulates?
			A)	Matter consists of atoms which are indestructible.
			B)	Atoms of an element are identical in all respects.
			C)	Compounds consist of atoms of different elements combined in specific ratios.
			D)	Atoms of one element cannot be converted into those of another element.
			E)	Atoms combine to form small groups called molecules.
3			J.J. Thomson
			A)	discovered the nucleus.
			B)	measured the charge of the electron.
			C)	discovered X-Rays.
			D)	measured the charge/mass ratio of the electron.
			E)	invented the cathode ray tube.
4			How many protons (p), neutrons (n) and electrons (e) are there, respectively, in an atom of the chlorine-39 isotope?
			A)	17 p, 17 n, 22 e
			B)	39 p, 38 n, 39 e
			C)	22 p, 17 n, 17 e
			D)	17 p, 39 n, 17 e
			E)	17 p, 22 n, 17 e
5			Isotopes of an element differ in their
			A)	chemical symbol
			B)	atomic number
			C)	mass number
			D)	chemical reactivity
			E)	number of protons
6			How many protons and electrons are present in a Ca2+ ion?
			A)	18 protons, 20 electrons
			B)	20 protons, 18 electrons
			C)	20 protons, 21 electrons
			D)	20 protons, 19 electrons
			E)	22 protons, 20 electrons
7			Magnesium consists of three isotopes with the following abundances and atomic masses: 24Mg 78.70% 23.985 amu 25Mg 10.13% 24.986 26Mg 11.17% 25.983 Based on these data the atomic weight of magnesium is
			A)	24.99
			B)	24.53
			C)	24.31
			D)	23.99
			E)	none of the above
8			The elements in a row of the periodic table are known as
			A)	a transition
			B)	a set
			C)	a group
			D)	a subset
			E)	a period
9			Which of the following has the most metallic character?
			A)	Ge
			B)	In
			C)	O
			D)	P
			E)	Sb
10			Elements in Group 6A (16) on the periodic table are most likely to form ________ with a charge of ______.
			A)	anions, 2-
			B)	anions, 2+
			C)	cations, 2+
			D)	cations, 2-
			E)	cations, 6+
11			The empirical formula for naphthalene, C10H8 is
			A)	CH
			B)	C10H8
			C)	C15H12
			D)	C5H4
			E)	C20H16
12			The correct name for CuSO4·5H2O is
			A)	cuprous sulfate pentahydrate
			B)	copper(I) sulfate pentahydrate
			C)	cuprous sulfate tetrahydrate
			D)	copper(II) sulfate tetrahydrate
			E)	copper(II) sulfate pentahydrate
13			The compound P4S10 is named _______ phosphorus ______ sulfide.
			A)	quadra, septa
			B)	tetra, deca
			C)	tetra, septa
			D)	quadra, deca
			E)	di, penta
14			Which of the following ions has an incorrect charge?
			A)	N3-
			B)	Al3+
			C)	S2-
			D)	Cl-
			E)	Mg2-
15			What is the formula weight for Fe4[Fe(CN)6]3?
			A)	635.91
			B)	859.31
			C)	435.37
			D)	491.22
			E)	747.61