Question

Solve this :

11. Two isotopes P and Q of atomic weight 10 and 20, respectively are mixed in equal amount by weight. After 20 days their weight ratio is found to be 1 : 4. Isotope P has a half-life of 10 days. The half-life of isotope Q is

(1) Zero (2) 5 days (3) 20 days (4) infinite

Answer 1

Answer:

think ao zero(o)

Explanation:

because day to day time rhe enery is decresing if it was increasint the ans will be the infinite but your the condition is like it is decreasing so the answer would be theZero

THANKYOU HOPE IT HELP YOU