nuclear fission. a large (heavy) nucleus nuclear fission a large (heavy) nucleus breaks into two...
TRANSCRIPT
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Nuclear Fission
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Nuclear Fission
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Nuclear FissionA large (heavy) nucleus
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Nuclear FissionA large (heavy) nucleus breaks into two smaller nuclei (of intermediate size)
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Nuclear FissionA large (heavy) nucleus breaks into two smaller nuclei (of intermediate size) and gives off one or more neutrons.
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Nuclear FissionA large (heavy) nucleus breaks into two smaller nuclei (of intermediate size) and gives off one or more neutrons.This process also releases a large amount of energy.
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23592U
The parent nucleus most commonly used for nuclear fission is Uranium–235
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23592U
The parent nucleus most commonly used for nuclear fission is Uranium–235
92 protons(235-92) = 143 neutrons
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23592U
The parent nucleus most commonly used for nuclear fission is Uranium–235
92 protons(235-92) = 143 neutrons
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23592U
The parent nucleus most commonly used for nuclear fission is Uranium–235
92 protons(235-92) = 143 neutrons
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neutron
23592U
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23692U
Unstable
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23692U
Unstable
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9236 Kr
Krypton–92
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9236 Kr
14156 Ba
Barium–141
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9236 Kr
14156 Ba
n
n
n
Neutron
Neutron
Neutron
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9236 Kr
14156 Ba
n
n
n
Energy
Energy
Energy
Energy
Energy
Energy
Energy
Energy
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1 236 141 92 10 92 56 36 0
235 1 141 92 192 0 56 36 0
23592 n U Ba Kr 3 n energy
U n Ba Kr 3 n energy
U
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235 236 141 92 192 92 56 36 0
235 1 141 92 192 0 56 36 0
10U U Ba Kr 3 n energy
U n Ba Kr 3 n energ
n
y
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235 1 141 92 192 0 56 36 0
235 1 141 92 192 0 56 36
2362
0
9U n Ba Kr 3 n eneU rgy
U n Ba Kr 3 n energy
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235 1 141 92 192 0 56 36 0
235 1 141 92 192 0 56 36
2362
0
9U n Ba Kr 3 n eneU rgy
U n Ba Kr 3 n energy
unstable
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235 1 236 92 192 0 92 36 0
235 1 141 92 192 0 56 3
14
6
16
0
5U n U Kr 3 n energy
U n Ba
B
Kr 3 n energ
a
y
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235 1 236 141 192 0 92 56 0
235 1 141 92 192 0 56 36 0
9236U n U Ba 3 n energy
U n Ba Kr 3 n en
K
g
r
er y
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235 1 236 141 9292 0 92 56 36
235 1 141 92 192 0 56 36 0
10U n U Ba Kr energy
U n Ba Kr 3 n ene g
3
r
n
y
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235 1 236 141 92 192 0 92 56 36 0
235 1 141 92 192 0 56 36 0
eneU n U Ba Kr 3 n
U n Ba Kr
r
3 n energ
gy
y
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235 1 236 141 92 192 0 92 56 36 0
235 1 141 92 192 0 56 36 0
eneU n U Ba Kr 3 n
U n Ba Kr
r
3 n energ
gy
y
heat gamma rays
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235 1 141 92 192 0 56 36 0
235 1 141 92 192 0 56 36
2362
0
9U n Ba Kr 3 n eneU rgy
U n Ba Kr 3 n energy
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23692
235 1 141 92 192 0 56 36
235 1 141 92 192 0 56 36 0
0
U n Ba Kr 3 n eneU
U n Ba Kr 3 n ene gy
gy
r
r
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23692
235 1 141 92 192 0 56 36
235 1 141 92 192 0 56 36 0
0
U n Ba Kr 3 n eneU
U n Ba Kr 3 n ene gy
gy
r
r
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235 236 141 9292 92 56 36
235 141 92 192 56 3
1 10 0
10 6 0
U U Ba Kr energy
U Ba Kr 3 n en
n 3 n
n ergy
Slow neutron
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235 236 141 9292 92 56 36
235 1 141 9292 0 56 3
1 10
16
0
0
U U Ba Kr energy
U n Ba Kr energy
n 3 n
3 n
Fast neutron
s
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235 1 141 92 192 0 56 36 0
235 1 141 92 156 36
2369
92 0 0
2U n Ba Kr 3 n eneU rgy
U n Ba Kr 3 n energy
Total charge on Left = 92
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23692
56 36
235 1 141 92 192 0 56 36 0
235 1 141 920 0
192
U n Ba Kr 3 n eneU rgy
U n Ba Kr 3 n energy
Total charge on Left = 92
Total charge on right= 56 + 36 + 3(0) = 92
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235 1 141 92 192 0 56 36 0
141 92 192 0 56 36
23692
2350
1
U n Ba Kr 3 n eneU rgy
U n Ba Kr 3 n energy
Total mass on left = 235 +1
= 236
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235 1 141 92 192 0 56 36 0
235 192 0 56 36
23692
141 20
9 1
U n Ba Kr 3 n eneU rgy
U n Ba Kr n ene3 rgy
Total mass on right= 141 + 92 + 3(1)
= 236
Total mass on left = 235 +1
= 236
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235 1 141 92 192 0 56 36 0U n Ba Kr 3 n energy
Many other fission reactions are possible for uranium–235
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Many of these fission products are highly radioactive and undergo beta and gamma decay.
235 1 141 92 192 0 56 36 0U n Ba Kr 3 n energy
Many other fission reactions are possible for uranium–235
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Many of these fission products are highly radioactive and undergo beta and gamma decay. Three particularly dangerous products are:
235 1 141 92 192 0 56 36 0U n Ba Kr 3 n energy
Many other fission reactions are possible for uranium–235
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Many of these fission products are highly radioactive and undergo beta and gamma decay. Three particularly dangerous products are:
Cesium–137 ( )
Strontium–90 ( )
Iodine–131 ( )
235 1 141 92 192 0 56 36 0U n Ba Kr 3 n energy
Many other fission reactions are possible for uranium–235
13153I
9038Sr
13755Cs
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Many of these fission products are highly radioactive and undergo beta and gamma decay. Three particularly dangerous products are:
Cesium–137 ( )
Strontium–90 ( )
Iodine–131 ( )
235 1 141 92 192 0 56 36 0U n Ba Kr 3 n energy
Many other fission reactions are possible for uranium–235
13153I
9038Sr
13755Cs
![Page 43: Nuclear Fission. A large (heavy) nucleus Nuclear Fission A large (heavy) nucleus breaks into two smaller nuclei (of intermediate size)](https://reader038.vdocuments.net/reader038/viewer/2022103023/56649e575503460f94b4fdee/html5/thumbnails/43.jpg)
Many of these fission products are highly radioactive and undergo beta and gamma decay. Three particularly dangerous products are:
Cesium–137 ( )
Strontium–90 ( )
Iodine–131 ( )
235 1 141 92 192 0 56 36 0U n Ba Kr 3 n energy
Many other fission reactions are possible for uranium–235
13153I
9038Sr
13755Cs
![Page 44: Nuclear Fission. A large (heavy) nucleus Nuclear Fission A large (heavy) nucleus breaks into two smaller nuclei (of intermediate size)](https://reader038.vdocuments.net/reader038/viewer/2022103023/56649e575503460f94b4fdee/html5/thumbnails/44.jpg)
Many of these fission products are highly radioactive and undergo beta and gamma decay. Three particularly dangerous products are:
Cesium–137 ( ) half-life 30 years, enters the body like
K.
Strontium–90 ( )
Iodine–131 ( )
235 1 141 92 192 0 56 36 0U n Ba Kr 3 n energy
Many other fission reactions are possible for uranium–235
13153I
9038Sr
13755Cs
![Page 45: Nuclear Fission. A large (heavy) nucleus Nuclear Fission A large (heavy) nucleus breaks into two smaller nuclei (of intermediate size)](https://reader038.vdocuments.net/reader038/viewer/2022103023/56649e575503460f94b4fdee/html5/thumbnails/45.jpg)
Many of these fission products are highly radioactive and undergo beta and gamma decay. Three particularly dangerous products are:
Cesium–137 ( ) half-life 30 years, enters the body like
K.
Strontium–90 ( ) half-life 30 years, stored in bones like
Ca
Iodine–131 ( )
235 1 141 92 192 0 56 36 0U n Ba Kr 3 n energy
Many other fission reactions are possible for uranium–235
13153I
9038Sr
13755Cs
![Page 46: Nuclear Fission. A large (heavy) nucleus Nuclear Fission A large (heavy) nucleus breaks into two smaller nuclei (of intermediate size)](https://reader038.vdocuments.net/reader038/viewer/2022103023/56649e575503460f94b4fdee/html5/thumbnails/46.jpg)
Many of these fission products are highly radioactive and undergo beta and gamma decay. Three particularly dangerous products are:
Cesium–137 ( ) half-life 30 years, enters the body like
K.
Strontium–90 ( ) half-life 30 years, stored in bones like
Ca
Iodine–131 ( ) half-life 8 days, absorbed by thyroid
gland.
235 1 141 92 192 0 56 36 0U n Ba Kr 3 n energy
Many other fission reactions are possible for uranium–235
13153I
9038Sr
13755Cs
![Page 47: Nuclear Fission. A large (heavy) nucleus Nuclear Fission A large (heavy) nucleus breaks into two smaller nuclei (of intermediate size)](https://reader038.vdocuments.net/reader038/viewer/2022103023/56649e575503460f94b4fdee/html5/thumbnails/47.jpg)
Finding a Missing Fission
Product
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Finding a Missing Fission Product
235 1 143 90 192 0 54 38 0U n Xe Sr 3 n
?
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Finding a Missing Fission Product
235 1 143 90 1592 0 4 38 0U n Xe Sr 3 n
Total charge on Left = 92
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Finding a Missing Fission Product
54 3235 1 143 90 1
92 0 8 0U n Xe Sr 3 n
Total charge on Left = 92
Total charge on right= 56 + 36 + 3(0) =
92
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Finding a Missing Fission Product
54 3235 1 143 90 1
92 0 08U n Xe Sr 3 n
Total charge on Left = 92
Total charge on right= 54 + 36 + 3(0) =
92
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Finding a Missing Fission Product
235 1 143 90 192 0 54 38 0U n Xe Sr 3 n
Total charge on Left = 92
Total charge on right= 54 + 36 + 3(0) =
92
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Finding a Missing Fission Product
235 1 143 90 192 0 54 3 08U n Xe Sr 3 n
Total charge on Left = 92
Total charge on right= 54 + 36 + 3(0) =
9292-54
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Finding a Missing Fission Product
235 1 143 90 192 0 54 3 08U n Xe Sr 3 n
Total charge on Left = 92
Total charge on right= 54 + 38 + 3(0) =
9292-54
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Finding a Missing Fission Product
235 1 143 90 192 0 54 3 08U n Xe Sr 3 n
Total charge on Left = 92
Total charge on right= 54 + 38 + 3(0) =
92
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Finding a Missing Fission Product
235 1 143 90 192 0 54 38 0U n Xe S 3 nr
Total charge on Left = 92
Total charge on right= 54 + 38 + 3(0) =
92
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235 1 143 90 192 0 54 38 0U n Xe Sr 3 n
Finding a Missing Fission Product
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143 90 192 0 55
4 323 1
8 0U n Xe Sr 3 n
Finding a Missing Fission ProductTotal mass on left= 235 + 1 = 236
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235 1 143 90 192 0 54 38 0U n Xe Sr 3 n
Finding a Missing Fission ProductTotal mass on left= 235 + 1 = 236
Total mass on right= 143 + 90 + 3(1) = 236
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235 1 90 192 0 5
1434 38 0U n Xe Sr 3 n
Finding a Missing Fission ProductTotal mass on left= 235 + 1 = 236
Total mass on right= 143 + 90 + 3(1) = 236
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235 1 143 9092 0 5 38 0
14U n Xe Sr 3 n
Finding a Missing Fission ProductTotal mass on left= 235 + 1 = 236
Total mass on right= 143 + 90 + 3(1) = 236
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235 1 143 9092 0 5 38 0
14U n Xe Sr 3 n
Finding a Missing Fission ProductTotal mass on left= 235 + 1 = 236
Total mass on right= 143 + 90 + 3(1) = 236
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235 1 143 90 192 0 54 38 0U n Xe Sr 3 n
Finding a Missing Fission ProductTotal mass on left= 235 + 1 = 236
Total mass on right= 143 + 90 + 3(1) = 236
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235 1 143 90 192 0 54 38 0U n Xe Sr 3 n
Finding a Missing Fission ProductTotal mass on left= 235 + 1 = 236
Total mass on right= 143 + 90 + 3(1) = 236
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235 1 143 192 0 5
93 00
4 8U n Xe Sr 3 n
Finding a Missing Fission ProductTotal mass on left= 235 + 1 = 236
Total mass on right= 143 + 90 + 3(1) = 236
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235 1 143 192 0 5
93 0084U n Xe S 3 nr
Finding a Missing Fission Product
The Missing Fission Product
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Finding the Number of NeutronsGiven Off
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137 97 152
235 14 092 0 0Te Zn 2 nU n
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137 9752
235 1 192 0 040Te U n 2 n Zn
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235 1 137 97 192 0 52 40 0U n Te Zn 2 n ?
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137 97 192 0 55
2 423 1
0 0U n Te Zn 2 n ?
Total mass on left= 235 + 1 = 236
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235 1 137 97 192 0 52 40 0U n Te Zn 2 n ?
Total mass on left= 235 + 1 = 236
Total mass on right= 137 + 97 + 2(1) = 236
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235 1 97 192 0 5
1372 40 0U n Te Zn 2 n ?
Total mass on left= 235 + 1 = 236
Total mass on right= 137 + 97 + 2(1) = 236
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235 1 137 192 0 5
94 07
2 0U n Te Zn 2 n ?
Total mass on left= 235 + 1 = 236
Total mass on right= 137 + 97 + 2(1) = 236
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235 1 137 9792 0 5 40 0
12U n Te Zn 2 n ?
Total mass on left= 235 + 1 = 236
Total mass on right= 137 + 97 + 2(1) = 236
234
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235 1 137 9792 0 5 40 0
12U n Te Zn 2 n ?
Total mass on left= 235 + 1 = 236
Total mass on right= 137 + 97 + 2(1) = 236
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235 1 137 9792 0 5 40 0
12U n Te Zn 2 n ?
Total mass on left= 235 + 1 = 236
Total mass on right= 137 + 97 + 2(1) = 236
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235 1 137 97 192 0 52 40 0U n Te Zn 2 n
Total mass on left= 235 + 1 = 236
Total mass on right= 137 + 97 + 2(1) = 236
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235 192 0 5
137 97 12 40 0U n Te Zn 2 n
Total mass on left= 235 + 1 = 236
Total mass on right= 137 + 97 + 2(1) = 236
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235 1 137 97 192 0 52 40 0U n Te Zn 2 n