Question

The time during which the quantity of any radioactive material becomes half of its original value, is called. 

A) Average age 

B) Half age 

C) Decay Constant 

D) Constant time

Answer 1

The correct option is B) Half age.

Half life is the time that a radioactive substance takes to become half of the initial quantity. So obviously after half life has passed the radioactive substance will be half of its initial quantity.