Question

A certain element disintegrates for a certain amount of time equal to its mean life . the fracition of the original amount that remains undecayed is?

Answer 1

⭐《ANSWER》

$\huge\mathfrak\pink {ANSWER}$

RADIOACTIVE DECAY

Answer 2

Explanation:

Mean life is half life/0.693

So fraction that remains undecayed wil be 1/2

1/0.693

=1/2

1.443

=0.3678