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Sahay Sir > Question Answers > AIIMS Last 24 Years Solved 1996 - 2019 Physics and Chemistry Video Solutions > Physics > Chapter 31 - Nuclei > A certain radioactive element has a half-life of 20 years. If you had a block with 10 g of the element in it, after how many years will there be just 2.5 g of the element in the block?

A certain radioactive element has a half-life of 20 years. If you had a block with 10 g of the element in it, after how many years will there be just 2.5 g of the element in the block?

A certain radioactive element has a half-life of 20 years. If you had a block with 10 g of the element in it after how many years will there be just 2.5 g of the element in the block?