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in Chemical kinetics by (67.7k points)
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The half-life of a radioactive element is 160 days. After 800 day 1 g of the element will reduce to

(a) 1/10 g

(b) 1/20 g

(c) 1/8 g

(d) 1/32 g

1 Answer

+1 vote
by (79.0k points)
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Best answer

Correct Option (d) 1/32 g

Explanation: 

We know that amount left after n-half lives

= a(1/2)n

= 1(1/2)800/160

=1/32 g

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