Give
the missing particle: U 235 + n
Rb 90 + ? + 2n
A)
Cs143
B)
Cs144
C)
Cs145
D) Sr144
E) Ba144
8.
Give
the missing particle: Zn 66 +
n
Cu 66 + ?
A)
positron
B)
neutron
C)
alpha
D)
beta
E) proton
9.
Give
the missing particle: O16 +
n
O15 + n + ?
A)
beta
B) positron
C)
neutron
D)
alpha
E)
proton
10.
Give
the missing particle: Sb121 + H1
? + n
A)
Te121
B)
Sn120
C)
Sb121
D) Sn121
E)
Te122
11.
Give
the missing particle: ? + n Au198
A)
Au196
B) Pt197
C)
Hg198
D) Au197
E) Au198
12.
Give
the missing particle: Li7 + H1
He4 + ?
A)
H2
B)
Be4
C)
He4
D)
H3
E) He3
13.
Give
the missing particle: N15 + H1
? + alpha
A)
N14
B)
N13
C)
C14
D)
C13
E)
C12
14.
Give
the missing particle: ? + n
U239 + gamma
A)
Th240
B) U238
C) Ra235
D)
U235
E)
Th237
15.
Give
the missing particle: Be9 + ?
C12 + n
A) alpha
B)
beta
C)
gamma
D)
positron
E)
electron
16.
Which
rxn is exothermic?
1) p
n + e+ 2) n
p + e-
A)
1
only
B)
2
only
C)
both
1 and 2
D)
neither
Information
for Questions 17-19: A hospital patient is injected with a salt solution
containing Sodium-24 (a beta emitter with a half-life of 15
hours) to trace blood flow and detect possible constrictions in
the circulatory system.
17.
How
much of the initial Sodium-24 remains active after 15
hours?
A) 12.5%
B)
25%
C)
50%
D)
75%
E)
90%
18.
How
much of the initial Sodium-24 remains active after 35
hours?
A)
22%
B) 18%
C)
24%
D)
20%
E)
16%
19.
How
many hours will it take for the activity of the Sodium-24 to drop to 1% of its initial value?
(see answer below)
20.
Find
the energy (kJ per mol of He) released by the rxn:
4H1
He4 + 2e+