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First Order Reaction

Define the ac...

Question

Define the activity of a given radioactive substance. Write its S.I. unit.

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Solution

Activity of a radioactive substance is defined as the number of radioactive disintegrations taking place in one second in the sample.
S.I. unit of activity is $B e c q u e r e l (B q)$
$1 B e c q u e r e l = 1 B q = 1$ $d e c a y$ $p e r$ $s e c o n d$

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