Radioactive Decay And Acid Dissociation Constant Chap. 9 And 10 Worksheet With Answers - Middle Tennessee State University Page 15
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20Radioactive Nuclei (Section 10.1)
10.3
Group the common nuclear radiations (Table 10.1) into the following categories:
a) those with a negative charge b) those with a mass number greater than 0
c) those that consist of particles
Solution
a) The beta particle has a negative charge.
b) The alpha and neutron have mass numbers greater than 0.
c) The alpha, beta, neutron, and positron radiations consist of particles.
10.5 Discuss how the charge and mass of particles that radiation comprises influence
the range or ability of the radiation to penetrate matter.
Solution
Particles having a high mass do not penetrate very far. The alpha particles
with a high charge and high mass are extremely limited in penetration.
Equations for Nuclear Reactions (Section 10.2)
10.7 Write appropriate symbols for the following particles using the, ZX symbolism.
a) a tin-117 nucleus
b) a nucleus of the chromium (Cr) isotope containing 26 neutrons
c) a nucleus of element number 20 that contains 24 neutrons
Solution
117
50
44
a)
Sn
b)
Cr
c)
Ca
50
24
20
10.9 Complete the following equations, using appropriate notations and formulas:
Solution
10
0
+
10
210
4
+
206
15
0
+
15
a)
Be
B
b)
Bi
Ti
c)
O
N
4
- 1
5
83
2
81
8
1
7
+
+
44
0
44
8
4
4
46
0
46
d)
Ti +
e
Sc
e)
Be
He
f)
V
Ti
22
- 1
21
4
2
2
23
1
22
10.11 Write balanced equations to represent decay reactions of the following isotopes.
The decay process or daughter isotope is given in parentheses.
Solution:
+
+
66
0
66
22
0
22
a)
Cu
Zn
b)
Na
Ne
29
- 1
30
11
1
10
19
0
+
19
192
4
+
188
c)
O
F
d)
Pt
Os
8
- 1
9
78
2
76
108
0
108
67
0
+
67
e)
Sn +
e
In
f)
Ni
Cu
50
- 1
49
28
- 1
29
Isotope Half-Life (Section 10.3)
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