Question

1g radioactive element reduces to 1/3g after 2 days. After total 6 days how much mass will remain?choose the correct option from the given options.
(A) 1/27 g
(B)1/6 g
(C) 1/9 g
(D) 1/12 g

Answer 1

Hey Dear,

◆ Answer -

(A) A2 = 1/27 g

◆ Explanation -

Amount of radioactive element at various times is related as -

A2/A0 = (A1/A0)^(t2/t1)

A2/1 = (1/3)^(6/2)

A2 = 1/3^3

A2 = 1/27 g

Therefore, after 6 days radioactive element will be 1/27 g.

Thanks dear. Hope this helps you..