Question

If 8.0 g of radioactive isotope has a half life of 10 hour, then the half life of 2.0 g the same substance is : 

(a) 2.5 hr 

(b) 5 hr 

(c) 10 hr 

(d) 40 hr

Answer 1

Correct option (c) 10 hr

Explanation:

Half life period of the substance depend upon the nature of the substance, not on the amount, so the half life period of 2 g is also 10 hrs.