A) \[\lambda \]decreases as the atom becomes older
B) \[\lambda \]increases as the age of atoms increases
C) \[\lambda \]independent of the age of atoms
D) \[\lambda \]behaviour of \[\lambda \]A with time depends on the nature of the activity
Correct Answer: C
Solution :
Decay constant of radioactive sample is reciprocal of the time after which the number of atoms of a radioactive substance decreases to 36.8% of their number of present initially and it does not depend on the age of the atoms.
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