The number of sample of cadmium-109 that will after the given time period is 32.0 g.
Number of sample that will remain after the given period
The number of sample that will after the given time period is calculated as follows;
N = N₀(¹/₂)^(t/r)
where;
- t is time period
- r is half life
- N₀ is initial sample
N = 256(¹/₂)^(1392/464)
N = 256(¹/₂)^³
N = 256/(2³)
N = 256/8
N = 32 g
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