Two isotopes P and Q of atomic weight 10 and 20, respectively are mixed in equal amount by weight. After 20 days their weight ratio is found to be 1 : 4. Isotope P has a half-life of 10 days. The half-life of isotope Q is
Two isotopes ′P′ and ′Q′ of atomic weight 10 and 20 respectively are mixed in equal amount by weight After 20 days their weight ratio is found to be 1:4 isotope P has a half - life of 10 days. The half -life of isotope Q is
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Q2
Two radio isotopes P and Q of atomic mass 10 and 20 respectively are mixed in equal amount by mass. After 20days, their weight ratio WPWQ is found to be 1 : 4. Isotope Q has a half-life of 10 days. The half-life of isotope P is :
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Q3
Two radioactive isotopes A and B of atomic mass X and Y are mixed in equal amount by mass. After 20 days, their mass ratio is found to be 1:4. Half life of 'A' is 1 day. What will be the half life of B?
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Q4
A radioactive isotope has a half-life of 3 days was received after 12 days. It was found that there were 3 g of the isotope in the container. The initial weight of the isotope when packed was:
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Q5
A radioactive isotope has a half-life of 10 days. If today 125 mg is left over, what was its original weight 40 days earlier?