Name: ____________________________________
Class: _____________
Date: _____________
Lesson Assessment: Nuclear Equations
1. Which reactant is missing in the following nuclear equation?
238
92
a)
b)
c)
d)
U +?
16
12
8
8
100
1
Fm + 5 n
0
Al
13
16
249
O
O
17
13
Al
2. What is emitted when a thorium 230 molecule reacts with a proton to form a francium 223 molecule?
a) 2 positron particles
b) 4 alpha particles
c) 4 positron particles
d) 2 alpha particles
3. In which type of radioactive decay does neither the atomic number nor the mass number of the atom
change?
a) positron
b) gamma
c) beta
d) alpha
4. Which type of radiation is emitted in the transmutation of carbon 14 into nitrogen 14?
a) beta
b) alpha
c) positron
d) gamma
PAGE 1
Name: ____________________________________
Class: _____________
Date: _____________
Lesson Assessment: Nuclear Equations
5. How does the nucleus of an atom change in alpha decay?
a) The number of protons decreases by 2 and the number of neutrons increases by 2.
b) The number of protons and the number of neutrons decrease by 2.
c) The number of protons and the number of neutrons increase by 2.
d) The number of protons increases by 2 and the number of neutrons decreases by 2.
6. How many protons does
226
88
Ra have?
a) 226
b) 88
c) 138
d) 314
7. An alpha particle is composed of _____.
a) 1 proton and 1 neutron
b) 1 proton and 2 neutrons
c) 2 protons and 1 neutron
d) 2 protons and 2 neutrons
8. Which product is missing in the following nuclear equation?
23
11
1
Na + H a)
b)
c)
d)
1
24
12
Mg
22
Ne
10
23
12
Mg
21
10
PAGE 2
Ne
1
? + 0n
Name: ____________________________________
Class: _____________
Lesson Assessment: Nuclear Equations
9. The capture of an electron by a nickel 59 nucleus produces _____.
a) neodymium 58
b) cobalt 58
c) neodymium 59
d) cobalt 59
10. A nucleus with too many neutrons can become more stable by _____.
a) converting a neutron into an alpha particle
b) converting a neutron into a proton by emitting a beta particle
c) converting a neutron into a beta particle
d) converting a neutron into a proton by emitting an alpha particle
PAGE 3
Date: _____________
ANSWER KEY
1. c
2. d
3. b
4. a
5. b
6. b
ANSWER KEY Page 1
7. d
8. c
9. d
10. b