A radioactive element has half-life period 1600 years. After 6400 years what amount will remain ?

Question

A radioactive element has half-life period 1600 years. After 6400 years what amount will remain ? (A) 1/2 (B) 1/16 (C) 1/8 (D) 1/4

Tardigrade Admin · Accepted Answer

6400 years = 4 half life periods. So, amount of element left = (1/24) = (1/16) th part.

Q. A radioactive element has half-life period 1600 years. After 6400 years what amount will remain ?