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Copyright 2011 CreativeChemistryLessons.com
Radioactive DecayRadioactive Decay
PLAY DON’T CHA VIDEO
What are the 3 types of decay?What are the 3 types of decay?1.1.AlphaAlpha
– Release of Helium nucleusRelease of Helium nucleus2.2.BetaBeta
– Release of an electronRelease of an electron3.3.GammaGamma
– Release of an energy burstRelease of an energy burst
What are the 3 types of decay?What are the 3 types of decay?1.1.AlphaAlpha
– Release of Helium nucleusRelease of Helium nucleus2.2.BetaBeta
– Release of an electronRelease of an electron3.3.GammaGamma
– Release of an energy burstRelease of an energy burst
Copyright 2011 CreativeChemistryLessons.com
Alpha Decay:Alpha Decay:
• When an unstable nucleus releases a Helium nucleus, which is called an ALPHA PARTICLE = HELIUM NUCLEUS
• When an unstable nucleus releases a Helium nucleus, which is called an ALPHA PARTICLE = HELIUM NUCLEUS
42 He42 He
PLAY ALPHA CLIPαα
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23892
42 U ?He +
ALPHA DECAY
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238 2342 90
429 H e h U + T
ALPHA DECAY
Alpha Decay:Alpha Decay:
42 He42 He
23892 U23892 U23490Th23490Th
ALPHA DECAY
23892 U23490Th
23892 U23490Th238
92 U23490Th
23892 U23490Th 238
92 U23490Th
23892 U23490Th
ALPHA DECAY
23892 U23490Th
WATCH!
RUN ALPHADECAY SIMULATOR
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Alpha Decay:Alpha Decay:
• Example Equation.• Example Equation.
211 484 2Po He ? + 211 484 2Po He ? +
21184 Po21184 Po 215
86 Po21586 Po 207
82 Pb20782 Pb
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Alpha Decay:Alpha Decay:
• Example Equation.• Example Equation.
236 492 2 ?U He + 236 492 2 ?U He +
24094 U24094 U 232
90Th23290Th 240
94 Pu24094 Pu
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Alpha Decay:Alpha Decay:
• Complete the equation.• Complete the equation.
226 488 2 + Ra He ?226 488 2 + Ra He ?
22892 U22892 U 230
90Th23090Th 222
86 Rn22286 Rn
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Alpha Decay:Alpha Decay:
• Complete the equation.• Complete the equation.
4 2372 93 + ? He Np 4 2372 93 + ? He Np
23391Pa23391Pa 241
95 Am24195 Am 233
91U23391U
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Alpha Decay:Alpha Decay:
• Complete the equation.• Complete the equation.
4 2402 92 + ? He U 4 2402 92 + ? He U
24494 Pu24494 Pu 244
96Cm24496Cm 238
94 Pu23894 Pu
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Beta Decay:Beta Decay:
• When an unstable nucleus turns a neutron into a proton and releases an electron.BETA PARTICLE = ELECTRON
• When an unstable nucleus turns a neutron into a proton and releases an electron.BETA PARTICLE = ELECTRON
01e01e
pn
ββ
PLAY BETA CLIP
0-1
146C ? e +
BETA DECAYppnn
014 146 7-1C + e N
BETA DECAYppnn
Protons and neutrons are made ofsmaller particles called QUARKS
Beta Decay:
01e
BETA DECAY
146C147 N
146C147 N
146C147 N
146C147 N
146C147 N
146C147 N
BETA DECAY
e146C147 N
WATCH!
RUN BETA DECAY SIMULATOR
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Beta Decay:Beta Decay:
• Example Equation.• Example Equation.
3 01 -1H e + ?3 01 -1H e + ?
02 He02 He 3
2 He32 He4
2 He42 He
p n
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Beta Decay:Beta Decay:
• Example Equation.• Example Equation.
232 090 -1Th e + ?232 090 -1Th e + ?
23292 U23292 U 232
91Pa23291Pa231
90Th23190Th
p n
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Beta Decay:Beta Decay:
• Example Equation.• Example Equation.
p n
140 058 -1e ?+ Ce 140 058 -1e ?+ Ce
13957 Ce13957 Ce 140
59 La14059 La140
59 Pr14059 Pr
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Beta Decay:Beta Decay:
• Example Equation.• Example Equation.
p n
0 150-1 62e + ? Sm 0 150-1 62e + ? Sm
15063Eu15063Eu150
61Pm15061Pm150
61Sm15061Sm
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Beta Decay:Beta Decay:
• Example Equation.• Example Equation.
p n
0-1
16468e + ? Er 0
-1164
68e + ? Er
16469Tm16469Tm 164
67 Er16467 Er164
67 Ho16467 Ho
Gamma Rays:Gamma Rays:
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Gamma Radiation:Gamma Radiation:
• When an unstable nucleus releases a burst of high energy wavelengths.GAMMA = ENERGY
• When an unstable nucleus releases a burst of high energy wavelengths.GAMMA = ENERGY
PLAY THE HULK CLIP PLAY GAMMA RAY VIDEO
γ
PLAY GAMMA CLIP
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241 4 2379 05 2 3
09Am He + Np + γ
GAMMA RAYS
γ
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Gamma Rays:Gamma Rays:
• Example Equation.• Example Equation.
226 088 0Ra γ + ?226 088 0Ra γ + ?
22286 Rn22286 Rn 227
89 Ac22789 Ac226
88 Ra22688 Ra
LESSON SUMMARYLESSON SUMMARY
Identify the Main Topic. Use my analogies.Identify the Main Topic. Use my analogies.The topic we learned in chemistry today The topic we learned in chemistry today was __________, which is caused by…was __________, which is caused by…
Give an example of the topic.Give an example of the topic.For instance, _____ is a good example of For instance, _____ is a good example of the topicthe topic because… because…
Explain additional details of your example.Explain additional details of your example.Furthermore, Furthermore, your exampleyour example shows shows the topicthe topic because it demonstrates…because it demonstrates…
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Penetration PowerPenetration PowerPenetration PowerPenetration Power
PLAY DON’T CHA VIDEO
Power of Radioactive DecayPower of Radioactive Decay1.1.AlphaAlpha
– Gets blocked by Gets blocked by paperpaper2.2.BetaBeta
– Gets blocked by Gets blocked by wood or wood or aluminumaluminum
3.3.GammaGamma– Gets blocked by Gets blocked by lead or thick lead or thick
concreteconcrete
Power of Radioactive DecayPower of Radioactive Decay1.1.AlphaAlpha
– Gets blocked by Gets blocked by paperpaper2.2.BetaBeta
– Gets blocked by Gets blocked by wood or wood or aluminumaluminum
3.3.GammaGamma– Gets blocked by Gets blocked by lead or thick lead or thick
concreteconcrete
PLAY RADIATION PENETRATION CLIP
PAPER
PAPER
WOODOR
ALUMINUM
WOODOR
ALUMINUM
LEADOR
CONCRETE
LEADOR
CONCRETE
PAPER
PAPER
WOODOR
ALUMINUM
WOODOR
ALUMINUM
LEADOR
CONCRETE
LEADOR
CONCRETE
BODY ARMOR
1: NONE2: PAPER3: WOOD4: ALUMINUM5: LEAD6: CONCRETE
SWORD
1: ALPHA2: ALPHA3: BETA4: BETA5: GAMMA6: GAMMA
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