- #1
Drizzy
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- 1
Homework Statement
1 Curie corresponds to the number of decay in 1 gram radium-226 in 1 second. How many Bequerel is 1 Curie?
Homework Equations
The Attempt at a Solution
Half life: 1600 years
1 gram = 0,001 kg = (0,001/1,660539*10^-27) u
one Radium atom = 226,0260974 u
Number of decays: (0,001/1,660539*10^-27)/226,0260974
Then I thought that since the half-life is so high that the activity won't change much in only 1 second so I though I could pretend that the activity is constant. So I just divided the number of decays with one second but my answer is wrong. In the key that I got from my teacher I am supposed to use this formula: A = lambda * N.
Is it wrong to assume that the activity doesn't change so much in 1 second?