Question

If 100 grams of carbon-14 decays until only 25 grams of carbon is left after 11,460 years, what is the half-life of carbon-14?

Answer 1

Start with 100 g so @ 1 half life will be 50 g remaining and 2 half lives will be 25 g remaining; therefore, it has gone through 2 half lives. so
11,460 years divided by 2 = 11,460/2 = half life = ?

Answer 2

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