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The half life of radium is 1600 years. A...

The half life of radium is 1600 years. After how much time will 1 g radium be reduced to 125 mg ?

A

800 years

B

1600 years

C

3200 years

D

4800 years

Text Solution

Verified by Experts

The correct Answer is:
D
`N=(N_(0))/((2)^(n)),0.125 g=(18)/((2)^(n))`
Half life, n=3
Total time `3xx1600=4800` years
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