In 90 seconds, the mass of a radioactive element reduces to \(\frac{1}{16}\) of its original value. Determine the half- life of the element.
a
15.0s
b
18.0s
c
22.5s
d
30.0s
e
45.0s
Explanation
Correct Option
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imieteRich
6 years ago
1 / 64 = (1/ 2)^n
(1/ 2)^ 6 = (1/ 2)^n =>
n = 6 half lives
Hence 1 half lives = 90 / 6 = 15
Option A
