| 191. |
Promethium-61 has a half-life of 17.7 years. How long must
a sample be stored for the radioactivity to drop to 1/32 its original
amount? Answer
|
|
A. |
17.7 years |
C. |
88.5 years |
|
B. |
70.8 years |
D. |
106 years |
|
|
|
|
|
| 192. |
Silicon-31 has an
atomic mass of 30.97536 amu. What is the nuclear mass defect
given Answer
proton 1.00728 amu
neutron 1.00867 amu
electron 0.00055 amu
|
|
A. |
0.27614 amu |
C. |
2.74271 amu |
|
B. |
0.28165 amu |
D. |
3.17151 amu |
|
|
|
|
|
| 193. |
The energy that
would be released if all the mass of an electrons, 0.00055 amu is converted into
energy is Answer
|
|
A. |
8.2 x 10 -14 J |
C. |
5.0 x 10 13 J |
|
B. |
8.2 x 10 -11 J |
D. |
5.0 x 10 16 J |
|
|
|
|
|
| 194. |
The nuclear forces
that hold a nucleus together compared to the force of gravity are Answer
|
|
A. |
stronger with a shorter range |
C. |
weaker with a shorter range |
|
B. |
stronger with a longer range |
D. |
weaker with a longer range |
|
|
|
|
|
| 195. |
Gamma decay produces
high energy Answer
|
|
A. |
electrons |
C. |
protons |
|
B. |
neutrons |
D. |
photons |
|
|
|
|
|
| 196. |
Rutherford's gold
foil experiment produced the following observation. Answer
|
|
A. |
All of the alpha
particles passed through the gold foil without deflection. |
|
B. |
Most of the alpha
particles were deflected by the gold foil. |
|
C. |
Most of the alpha
particles were not deflected by the gold foil. |
|
D. |
None of the alpha
particles made it through the gold foil. |
|
|
|
|
|
| 197. |
210Po
--> 206Pb + ____ + energy This
nuclear reaction is an example of a(n) Answer
|
|
A. |
alpha decay |
C. |
beta decay |
|
B. |
positron decay |
D. |
electron capture |
|
|
|
|
|
| 198. |
39Cl
---> 39Ar + ___ + energy This
nuclear reaction is an example of a(n) Answer
|
|
A. |
alpha decay |
C. |
beta decay |
|
B. |
positron decay |
D. |
electron capture |
|
|
|
|
|
| 199. |
26Si
---> 26Al + __ + energy This nuclear
reaction is an example of a(n) Answer
|
|
A. |
alpha decay |
C. |
beta decay |
|
B. |
positron decay |
D. |
electron capture |
|
|
|
|
|
| 200. |
129Cs
+ ___ ---> 129Xe +
energy This nuclear reaction is an example of a(n)
Answer
|
|
A. |
alpha decay |
C. |
beta decay |
|
B. |
positron decay |
D. |
electron capture |
