Nuclear Chemistry
Alpha Decay problems 42He
241
95Am

4
2He
+
237
93Np
1)
What is the equation when 24195Am does an alpha decay?
241
4
237
95Am  2He +
93Np
2)
What is the equation when 23992U does an alpha decay?
239
4
235
92U  2He +
90Th
3)
What is the equation when 4119K does an alpha decay?
41
4
37
19K  2He +
17Cl
4)
What is the equation when 11548Cd does an alpha decay?
115
4
111
48Cd  2He +
46Pd
Alpha bombardment problems 42He
235
4
239
92U + 2He  +
94Pu
212
5)
What is the equation when 83Bi does an alpha bombardment?
212
4
216
83Bi + 2He 
85At
6)
What is the equation when 22286Rn does an alpha bombardment?
222
4
226
86Rn + 2He 
88Ra
7)
What is the equation when 8938Sr does an alpha bombardment?
89
4
93
38Sr + 2He  40Zr
8)
What is the equation when 4318Ar does an alpha bombardment?
43
4
47
18Ar + 2He  20Ca
Beta Decay problems 0-1e
238
92U
 0-1e +
238
93Np
9)
What is the equation when 24797Bk does beta decay?
247
0
247
97Bk  -1e +
98Cf
10)
What is the equation when 262103Lr does beta decay?
262
0
262
103Lr  -1e +
104 Rf
11)
What is the equation when 9340Zr does beta decay?
93
0
93
40Zr  -1e + 41 Nb
12)
What is the equation when 13555Cs does beta decay?
135
0
135
55Cs  -1e +
56 Ba
13)
What is the equation when 16065Tb does beta decay?
160
65Tb

0
-1e
+ 16066 Dy
Beta bombardment problems 0-1e
238
93Np +
0
-1e
 +
238
92U
14)
What is the equation when 8034Se does beta bombardment?
80
0
80
34Se + -1e  33 As
15)
What is the equation when 21183Bi does beta bombardment?
211
0
211
83Bi + -1e 
82 Pb
16)
What is the equation when 10746Pd does beta bombardment?
107
0
107
46Pd + -1e 
45 Rh
17)
What is the equation when 4621Sc does beta bombardment?
46
0
46
21Sc + -1e  20 Ca
18)
What is the equation when 14257La does beta bombardment?
142
0
142
57La + -1e 
56 Ba
19)
20)
Which type of radiation would best be stopped by a piece of cardboard?Alpha
Which type of radiation is the most penetrating?
Gamma
21)
If you have 10 grams of an isotope of Francium-223, how much will remain after 75
years if it has a half-life of 25 years?
Years
Grams
0
10
25
5
50
2.5
75
1.25
Half-life
0
1
2
3
22)
Half-life
0
1
2
3
4
5
If you have 80 grams of an isotope of Iodine-131, how much will remain after 20
days if it has a half-life of 4 days?
Days
Grams
0
80
4
40
8
20
12
10
16
5
20
2.5
23)
If you have 10 grams of an isotope of Uranium-242, that has been in a sealed
container for 20 years and the half-life is 4 years, how much Uranium-242 did you
originally start with?
Half-life
5
4
3
2
1
0
24)
Years
20
16
12
8
4
0
Grams
10
20
40
80
160
320
If you have 3 grams of an isotope of Californium-251, that has been in a sealed
container for 30 and the half-life is 6 days, how much Californium-251 did you
originally start with?
Half-life
Years
Grams
5
4
3
2
1
0
30
24
18
12
6
0
3
6
12
24
48
96