Half lives of two isotopes X and Y of a material are known to be 2×10 – InterviewSolution

1.	Half lives of two isotopes X and Y of a material are known to be 2×109 years and 4×109 years respectively. If a planet forms with equal number of these isotopes , estimate the current age of the planet, given that currently the material has 20% of X and 80% of Y by number
Answer» Half lives of two isotopes X and Y of a material are known to be $2 \times 10^{9}$ years and $4 \times 10^{9}$ years respectively. If a planet forms with equal number of these isotopes , estimate the current age of the planet, given that currently the material has 20% of X and 80% of Y by number

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