A sample of wood that originally contained 100 grams ofcarbon-14 now contains only 25 grams of Carbon-14. Approximately how many years ago was this sample part of a living tree?

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Answer 1 · 2018-01-01T08:16:43

The answer is #=11460 "years"#

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The half life of #C-14# is #t_(1/2)=5730 "years"#

This means that if you start with a sample of #100g#, only

#50g# will be left in #5730 "years"#

Here,

Only #25g # is left , therefore the

number of years is #=5730*2=11460"years"#