Half Life Natural Transmutation

Artificial Transmutation

Radioactive Particles

Good/Bad/ Ugly

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Final Jeopardy

Final Jeopardy Category

Final Jeopardy

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$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?

$200

False

•True or False: A radioactive particle gets bombarded by a particle in natural transmutation

$400

147N

146C 0

-1e + ________

$600

42He

23090Th _____ 226

88Ra

$800

1910Ne

_____ 0+1e + 19

9F

$1000

3719K

• 3720Ca 0

+1e + _______

$200

•True

•True or False: A radioactive particle gets bombarded by a particle in artificial transmutation

$400

Fusion

Name this type of AT is 2

1H +11H 4

2He + 2 11H + energy

$600

• 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?

$1000

14158Ce or Ce-141

A barium-137 atom is bombarded with an alpha particle. What isotope is

formed?

HINT: 137Ba + 42He _______

$200

• 42He

•draw the notation for an alpha particle

$800

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)

$800

gamma or neutron

This particle does not affect the atomic number

$1000

Gamma, no charge

•This particle does not affect the atomic number or the mass number, what is its charge

$200

•U-235

This isotope is used for making atomic bombs

$400

C-14

•This isotope is usually used for relative dating of fossils (carbon dating)

$600

Mold (spores) and bacteria

•Foods are irradiated to kill these

$800

•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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The Jeopardy champion!