Question

Two radioactive elements r and s disintegrate as rp+;r=4.5103 years1rp+;r=4.5103 years1 sp+;s=3103years1sp+;s=3103years1 starting with number of atoms of r and s in the ratio of 2 : 1, this ratio after the lapse of three half lives of r will be :

Answer 1

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