Question

In one average-life,
(a) half the active nuclei decay
(b) less than half the active nuclei decay
(c) more than half the active nuclei decay
(d) all the nuclei decay.

Answer 1

Dear Student,

◆ Answer - (c)

In one average-life, more than half the active nuclei decay.

● Explanation -

Average half life of an atom is given by -

t = 1/(1.44k)

In one average half life, 64 % of the active nuclei decay. Therefore, in one average life more than half (50 %) nuclei will disintegrate.

Thanks dear for asking. Hope this is helpful to you..

Answer 2

Explanation:

• In one average life, there will be an active nuclei decay for more than half.
• The mean lifetime for decaying a nucleus is the average life.
• It is shown as τ = Τ120.693 = 1λ
• Here, τ is the average life, Τ12 is the half lifetime and λ is the decay constant. The average lifetime’s value is more than the average lifetime.
• So, more than half the active nuclei decay in one average life.