Nuclear Chemistry Part 2
Alpha Decay problems 42He
241
95Am

4
2He
+
237
93Np
1)
What is the equation when 25499Es does an alpha decay?
254
4
250
99Es  2He +
97Bk
2)
What is the equation when 20080Hg does an alpha decay?
200
4
196
80Hg  2He +
78Pt
3)
What is the equation when 5827Co does an alpha decay?
58
4
54
27Co  2He +
25Mn
4)
What is the equation when 2814Si does an alpha decay?
28
4
24
14Si 2He +
12Mg
Alpha bombardment problems 42He
235
92U
+
4
2He

83
94Pu
5)
What is the equation when 8737Rb does an alpha bombardment?
87
4
91
37Rb + 2He 
39Y
6)
What is the equation when 9843Tc does an alpha bombardment?
98
4
102
43Tc + 2He 
45Rh
7)
What is the equation when 9038Sr does an alpha bombardment?
90
4
94
38Sr + 2He 
40Zr
8)
What is the equation when 22286Rn does an alpha bombardment?
222
4
226
86Rn + 2He 
88Ra
Beta Decay problems 0-1e
238
92U
 0-1e +
238
93Np
9)
What is the equation when 263106Sg does beta decay?
263
0
263
106Sg  -1e +
107Bh
10)
What is the equation when 22387Fr does beta decay?
223
0
223
87Fr  -1e +
88Ra
11)
What is the equation when 19376Os does beta decay?
193
0
193
76Os  -1e +
77Ir
12)
What is the equation when 253100Fm does beta decay?
253
0
253
100Fm  -1e +
101Md
13)
What is the equation when 17370Yb does beta decay?
173
0
173
70Yb  -1e +
71Lu
Beta bombardment problems 0-1e
238
93Np +
0
-1e

238
92U
14)
What is the equation when 13857La does beta bombardment?
138
0
138
57La +
-1e 
56Ba
15)
What is the equation when 18574W does beta bombardment?
185
0
185
74W +
-1e 
73Ta
16)
What is the equation when 16768Er does beta bombardment?
167
0
167
68Er +
-1e 
67Ho
17)
What is the equation when 257103Lr does beta bombardment?
257
0
257
103Lr +
-1e 
102No
18)
What is the equation when 3919K does beta bombardment?
39
0
39
19K +
-1e 
18Ar
19)
What is it called when two smaller nuclei come together to form a larger nucleus?
fusion
What is it called when a nucleus splits up to form two or more smaller nuclei?
fission
Which type of radiation is the most penetrating and what can be used to shield it?
Gamma and 6 inches of lead
Which type of radiation is the least penetrating and what can be used to shield it?
Alpha and it can be stopped by clothing
20)
21)
22)
23)
If you have 512 grams of an isotope of Thallium-204, how much will remain after 72
days if it has a half-life of 8 days?
Half-life
Days
Grams
0
0
512
1
8
256
2
16
128
3
24
64
4
32
32
5
40
16
6
48
8
7
56
4
8
64
2
9
72
1
24)
If you have 96 grams of an isotope of Technetium-98, how much will remain after 35
days if it has a half-life of 7 days?
Half-life
Days
Grams
0
0
96
1
7
48
2
14
24
3
21
12
4
28
6
5
35
3
25)
If you have 50 grams of an isotope of Plutonium-239, that has been in a sealed
container for 2100 years and the half-life is 300 years, how much Plutonium-239 did
you originally start with?
Half-life
7
6
5
4
3
2
1
0
26)
Years
2100
1800
1500
1200
900
600
300
0
Grams
50
100
200
400
800
1600
3200
6400
If you have 0.5 grams of an isotope of Nobelium-254, that has been in a sealed
container for 3 hours and the half-life is 20 minutes, how much Nobelium-254 did
you originally start with?
Half-life
Minutes
Grams
9
180
0.5
8
160
1
7
140
2
6
120
4
5
100
8
4
80
16
3
60
32
2
40
64
1
20
128
0
0
256