Answer to Question #139402 in General Chemistry for Miiko

Question

Suppose you have an element with a Radioactivity of 175 Rad. What will be the resulting
Radioactivity if it undergoes its a)1 st half-life? b)2 nd half-life? and c)5 th half-life?

Answer 1

The radioactivity changes according to this equasion:

A=A₀/2ⁿ;

A₀ - initial radioactivity;

A - radioactivity after it undergoes n half-life decay

a) A=175/2=87.5 Rad;

b)A=175/2²=175/4=43.75 Rad;

c)A=175/2⁵=175/32=5.47 Rad;