Lesson 12.04 Nuclear Reactions
Lesson 12.05 Mass-Energy Equivalence
Self-Check Quiz
1. Which of the following fundamental forces has a very small relative
strength?
a. gravitational force
b. electromagnetic force
c. strong nuclear force
d. weak nuclear force
Answer: _____
2. The binding energy of an element is 298 MeV. What is the mass defect
of this nucleus in atomic mass units (u)?
a. 3.13 u
b. 2.30 u
c. 0.882 u
d. 0.320 u
Answer: _____
3. When an unstable nucleus undergoes β- decay, the number of:
a. neutrons decreases
b. protons increases
c. neutrons decreases and protons increases
d. neutrons increases and protons decreases
Answer: _____
4. Which one of the following is not affected by a magnetic field?
a. alpha radiation
b. β- radiation
c. β+ radiation
d. γ radiation
Answer: _____
5. The nuclear equation C-14 N-14 + e- is for:
a. alpha decay
b. beta minus decay
c. gamma decay
d. electron capture
e. beta plus decay
Answer: _____
6. An atom has 98 protons and 249 nucleons. If it undergoes alpha
decay, what are the numbers of protons and nucleons, respectively, in
the daughter nucleus?
a. 100, 245
b. 94, 247
c. 96, 245
d. 100, 249
e. 98, 249
f. 96, 247
Answer: _____
7. When a nucleus undergoes beta decay its:
a. atomic number decreases by one
b. atomic number increases by one
c. mass number decreases by one
d. mass number increases by one
Answer: _____
8. If Cr decays by emission of a negative beta particle, the resulting
nuclide is:
a. Ti
b. V
c. Cr
d. Mn
Answer: _____
9. Heavier elements require more ________ in order to maintain
stability.
a. electrons
b. protons
c. neutrons
Answer: _____
10. The alpha-decay of
226 Ra
88
gives:
a. 22286Rn
b. 22789 Ac
c. 22486Rn
d. 22292U
e. 23090Th
Answer: _____
11. The equation that represents the -decay of Polonium is:
a.
b.
c.
d.
Answer: _____