Half Life Natural Transmutation Artificial Transmutation Radioactive Particles Good/Bad/ Ugly $ 200...
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Transcript of Half Life Natural Transmutation Artificial Transmutation Radioactive Particles Good/Bad/ Ugly $ 200...
Half Life Natural Transmutation
Artificial Transmutation
Radioactive Particles
Good/Bad/ Ugly
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Final Jeopardy
Final Jeopardy Category
Final Jeopardy
answer
question
$200
half life
•The amount of time it takes for a radioactive sample to decay to ½ of itself original mass is called_____
$400
50%
If a radioactive sample goes through 1 half life, what percent of
the sample is left?
$600
1/16 = 6.25%
•A sample goes through 4 half lives. What fraction of the sample remains? What percent remains?
$800
K-42
•Looking at Table N, what radioisotope has a half life of 12.36 hours
$1000
15g
•60g sample of N-16 goes through 2 half lives, how much of N-16 would remain?
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False
•True or False: A radioactive particle gets bombarded by a particle in natural transmutation
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147N
146C 0
-1e + ________
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42He
23090Th _____ 226
88Ra
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1910Ne
_____ 0+1e + 19
9F
$1000
3719K
• 3720Ca 0
+1e + _______
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•True
•True or False: A radioactive particle gets bombarded by a particle in artificial transmutation
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Fusion
Name this type of AT is 2
1H +11H 4
2He + 2 11H + energy
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• Alpha is positive and so is the nucleus, they want to repel
•Why was an alpha particle have to bombard a nucleus at really high speeds?
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14158Ce or Ce-141
A barium-137 atom is bombarded with an alpha particle. What isotope is
formed?
HINT: 137Ba + 42He _______
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• 42He
•draw the notation for an alpha particle
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Fission
Name this type of AT 235
92U +10n 143Ba + 90Kr + 3 1
0n + energy
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0-1e
•draw the notation for a B- (beta)
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0+1e
•draw the notation for the B+ (positron)
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gamma or neutron
This particle does not affect the atomic number
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Gamma, no charge
•This particle does not affect the atomic number or the mass number, what is its charge
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•U-235
This isotope is used for making atomic bombs
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C-14
•This isotope is usually used for relative dating of fossils (carbon dating)
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Mold (spores) and bacteria
•Foods are irradiated to kill these
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•cancer treatment, energy, treating food
Name one good use of radioactive isotopes
$1000C-14 p=6 and n=8
Not a 1 to 1 ratio of protons to neutrons
C-14 vs N-14
Only one is radioactive…Which one and why?
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Daily Double
10g
The half-life of K-42 is 12.4 hours. How much of a 320g sample is left after
62 hours
Daily Double
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Daily Double
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