Question

the radioactive isotopes have a half life of 3 days. the time after which its activity is reduced to 6.25% of its original activity is?​

Answer 1

given,

half time of radioactive isotopes = 3days

hence it will reduce to 50% in 3 days

it will reduce to 25% in 6 days

it will reduce to 12.5% in 9 days

it will reduce to 6.25% in 12 days .

hence the radioactive isotopes will reduce to 12.5% in 12 days .

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