1.

The nuclei of two radioactive isotopes of same substance A236 and A234 are present in the ratio 4:1 in an ore obtained from Mars. Their halflives are 30 min and 60 min respectively. Both isotopes are alpha emitters and the activity of the isotope with half-life 30 min is one Rutherford. Calculate after how much time (in min) their activities will become identical.

Answer» The nuclei of two radioactive isotopes of same substance A236 and A234 are present in the ratio 4:1 in an ore obtained from Mars. Their halflives are 30 min and 60 min respectively. Both isotopes are alpha emitters and the activity of the isotope with half-life 30 min is one Rutherford. Calculate after how much time (in min) their activities will become identical.


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