Chemistry Term 1 Review Worksheet With Answers Page 2
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17Chem term # 1 review sheet
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12. The nuclides
C and
N are similar in that they both have the
17.
Neutral atoms of
Cl and
Cl di er with respect to their
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same
number of
A. mass number
B.
atomic number
A. electrons
B.
protons
C.
neutrons
D. positrons
C.
number of neutrons
D. nuclear charge
18.
Which pair must represent atoms of the same element?
13. Which element has no known stable isotope?
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13
A.
X and
B.
X and
X
X
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6
6
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4
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C.
X and
D.
X and
A. carbon
B.
potassium
X
X
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2
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C.
polonium
D. phosphorus
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19.
Given the nuclear reaction:
N +
He !
H + X. Which isotope
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2
1
is represented by the X when the equation is correctly balanced?
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14.
In the reaction
Al +
He ! X +
n, the isotope represented by
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0
X is
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A.
O
B.
O
C.
F
D.
F
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A.
Mg
B.
Al
C.
Si
D.
P
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20. All atoms in a given sample of an element contain the same
number of
15. An element occurs as a mixture of isotopes. The atomic mass
A. nucleons and electrons
B.
nucleons and neutrons
of the element is based upon
C.
protons and electrons
D. protons and neutrons
A. the masses of the individual isotopes, only
B.
the relative abundances of the isotopes, only
C.
both the masses and the relative abundances of the
individual isotopes
21.
Which symbols represents atoms that are isotopes of each other?
D. neither the masses nor the relative abundances of the
individual isotopes
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A.
C and
N
B.
O and
O
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131
222
222
C.
I and
I
D.
Rn and
Ra
16.
All isotopes of a given element must have the same
22. Which element has no stable isotopes?
A. atomic mass
B.
atomic number
C.
mass number
D. number of neutrons
A. Ar
B.
Kr
C.
Rn
D. Xe
page 2
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