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Grade 12Thermal Physics

Half life of a certain radioactive substance is 69.3 days. Its disintegration constant is:

Jai Mahyavanshi

8 Years agoGrade 12

2 Answers

Adarsh

8 Years ago

Dear student,

half life for 1^st order reaction = 0.693/k

so 69.3=0.693/k => k= 100.

Thanks and Regards

Adarsh

anuragmishra

6 Years ago

Half life for first order reaction= 0.693 / K

69.3 = 0.693/K

K= 0.01day-1

Here K is decay constant

Thanks and Regards

Anurag Misra

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