1.

A radioactive nucleus X converts into stable nucleus Y. Halfradioactive sample when the ratio of X and Y is 1:15.life of X is 50 years. Calculate the age of2

Answer»

Initial concentration of X is 1.Final concentration of X is 1/(1+15) = 1/16.Given: Half life of X is 50yrs.Therefore,

X -> X/2 ( 50 years ) ,X/2 -> X/4 ( + 50 yrs ),X/4 -> X/8 ( + 50 yrs ),X/8-> X/16 ( + 50 yrs )

Therefore, age of radioactive sample is

50+50+50+50 = 200 years



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