4. Radium decomposes approximately at a rate proportional to the amount present. If it is 100 grams now, and it will be 96 grams a hundred years later, find a) the half-life of the radium b) the time it takes for 2/3 of its amount to be decomposed.

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Q: 1. Radium decomposes at a rate proportional to the amount present. In 100 yrs, 100 mg of radium…

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Q: 9. A sample of tritium-3 decayed to 94.5% of its original amount after a year (a) What is the…

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