▼ Part C - The initial sample is 3.1 kg. What is the mass of the radioactive material that remains after 3.50 years? Keep 3 digits after the decimal point. mass remains = Keep 3 digits after the decimal point. mass decayed = Part Din Part C, What is the mass of the radioactive material that has decayed in 3.50 years? 17 ΑΣΦ Ro= Keep 2 digits after the decimal point. G| ΑΣΦ G| ΑΣΦ N= Part E - New case: The initial sample has No = 6.4x1010 radioactive nuclei. What is the initial activity in decays/s (Bq)? Use scientific notations, format 1.234*10". [5] ΑΣΦ C ? ? ? Bq Part F-New case: The initial sample has No = 6.4x1010 radioactive nuclei. What is the number of radioactive nuclei that remain after 3.50 years? kg ? kg
▼ Part C - The initial sample is 3.1 kg. What is the mass of the radioactive material that remains after 3.50 years? Keep 3 digits after the decimal point. mass remains = Keep 3 digits after the decimal point. mass decayed = Part Din Part C, What is the mass of the radioactive material that has decayed in 3.50 years? 17 ΑΣΦ Ro= Keep 2 digits after the decimal point. G| ΑΣΦ G| ΑΣΦ N= Part E - New case: The initial sample has No = 6.4x1010 radioactive nuclei. What is the initial activity in decays/s (Bq)? Use scientific notations, format 1.234*10". [5] ΑΣΦ C ? ? ? Bq Part F-New case: The initial sample has No = 6.4x1010 radioactive nuclei. What is the number of radioactive nuclei that remain after 3.50 years? kg ? kg
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Transcribed Image Text:Learning Goal:
Radioactive decay - Half-life
N
1,000,000
500,000
250,000
125,000
62,500
Number of nuclides, N x 10³
1000
750
500
250
125
0
Time
0
the
2012
3h2
4112
5h2
612
7h2
8h2
9412
10₁2
31,250
15,625
he 2h 3h 4h 5h 6h 7he 8he 9h 10h
Time in multiples of f
7,813
3,906
1,953
977
A radioactive sample's half-life is 30.2 years. 1 year = 365 days, 1 day = 24 hours, 1 hour = 60 min,
1 min = 60 s

Transcribed Image Text:▼
Part C- The initial sample is 3.1 kg. What is the mass of the radioactive material that remains after 3.50 years?
Keep 3 digits after the decimal point.
mass remains =
Keep 3 digits after the decimal point.
mass decayed =
Part Din Part C, What is the mass of the radioactive material that has decayed in 3.50 years?
195| ΑΣΦ
Ro=
Keep 2 digits after the decimal point.
Π| ΑΣΦ
IVE ΑΣΦ
N=
Part E-New case: The initial sample has No = 6.4x1010 radioactive nuclei. What is the initial activity in decays/s (Bq)?
Use scientific notations, format 1.234*10".
ΓΙ ΑΣΦ
?
?
?
Bq
kg
?
Part F - New case: The initial sample has No = 6.4x1010 radioactive nuclei. What is the number of radioactive nuclei that remain after 3.50 years?
kg
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