Transcript Chemistry - Mrs. Stevens` Chem Site

Give It Some Thought
Clicker Questions
Chapter 2
ATOMS,
MOLECULES
AND IONS
James Hill
California State University, Sacramento
with contributions by Todd Austell
© 2012 Pearson Education, Inc.
a.
A. the law of conservation of matter
B. the law of multiple proportions
C. the law of constant composition
D. the law of conservation of grams
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b.
A.
The second compound must have twice as many oxygen
atoms per carbon atom as the first compound.
B.
The second compound must have half as many oxygen
atoms per carbon atom as the first compound.
C.
The second compound contains half as many carbon atoms
as the first compound.
D.
The first compound contains half as many carbon atoms as
the second compound.
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A.
B.
C.
D.
 particles are scattered equally across a range of
deflection angles due to the high density of the foil
nuclei.
Most  particles pass through the foil without being
deflected, because most of the volume of the atoms that
comprise the foil is empty space.
Most  particles are scattered at acute angles as they
pass close to the foil nuclei.
Most  particles are deflected in a backwards direction
from the foil due to the high density of the foil atom
nuclei.
© 2012 Pearson Education, Inc.
© 2012 Pearson Education, Inc.
a.
A. Cannot determine number of electrons without
additional information.
B. The atom has 30 electrons.
C. The atom has 15 electrons.
D. The atom has no electrons unless it is charged.
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b.
A. The protons reside in the nucleus of the atom.
B. The protons are evenly distributed throughout
the atom.
C. The protons are dispersed with the electrons
around the nucleus.
D. The protons reside in a shell just outside the
nucleus.
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A. The 52.94 amu value and the 51.99 amu value
represent two different isotopes of chromium.
B. The atomic weight of chromium does not depend
on the atom with a mass of 52.94 amu.
C. The atomic weight of 51.99 amu is for a different
isotope than the 52.94 amu mass.
D. The atomic weight of chromium (51.99 amu) is
an average atomic mass of all the naturally
occurring isotopes of chromium.
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a.
A.
B.
C.
D.
C
Cr
Cl
Co
© 2012 Pearson Education, Inc.
© 2012 Pearson Education, Inc.
b.
A.
B.
C.
D.
3rd period and Group 7A
2nd period and Group 6A
2nd period and Group 5A
3rd period and Group 8A
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c.
A.
B.
C.
D.
7
17
19
35
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d.
A. metal
B. nonmetal
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a.
A.
B.
C.
D.
CH
CH3
CH6
C2H6
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b.
A.
B.
C.
D.
CH
CH3
C2H2
CH6
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c.
A.
B.
C.
D.
perspective model
visual depth model
ball and stick model
space-filling model
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A. The formula for calcium oxide is actually Ca2O.
B. The number of Ca2+ ions paired with O2– ions in
a compound can vary.
C. Two Ca2+ ions can never be found in nature
with an O2– ion.
D. Empirical formulas are used for ionic
compounds.
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a.
A. Chromium is a nonmetal and requires a Roman
numeral after its name.
B. Roman numerals are optional after the metal in
ionic compounds.
C. A transition element having variable oxidation
states requires a Roman numeral, whereas
calcium is only a +2 ion in metal oxides and
does not.
D Only transition elements with +2 and +3 ion
states require Roman numerals.
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b.
A. It contains only metals.
B. It is a nonmetal anion.
C. It is monatomic ion of a nonmetal.
D. It contains only nonmetals.
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A. All three suffixes relate to the number of
oxygen atoms in an anion.
B. -ide is typically used for 1-anions, while -ate
and -ite are for 2- and 3-anions respectively.
C. -ide usually means a monatomic anion and -ate
and -ite signify differing numbers of oxygen
atoms in oxyanions.
D. -ide, -ate, and -ite convey information about the
the number of nonmetal atoms in a
polyatomic anion.
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A.
B.
C.
D.
BO44– and SiO33–
BO33– and SiO44–
BO43– and SiO34–
BO34– and SiO43–
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© 2012 Pearson Education, Inc.
A.
B.
C.
D.
Iodic acid
Hypoiodous acid
Iodous acid
Periodic acid
© 2012 Pearson Education, Inc.
© 2012 Pearson Education, Inc.