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Standard XII

Chemistry

Density

The ratio of ...

Question

The ratio of the number of atoms of two radioactive elements A and B in equilibrium with each other, is 3.1×10^9 : 1 If t1/2of element B is 6.45 years calculate t1/2 of element A Options (1) 31×10^9 (2) 2×10^9 (3) 3.1 ×10^10 (4) 2×10^10

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