'Carbon 14 present' diaporamas de présentation

3.1-3.4 Review

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Half-Life

Half-Life. Pg. 870-874. Half-Life. Half-life = the time needed for half of the radioisotope sample to decay into products Half-live can have varying lengths May be a fraction of a second Can last billions of years. Examples: Carbon-14 = 5730 years Potassium-40 = 1.25x10 9 years

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example 7

example 7. Carbon-14 Dating. Chapter 5.1. During the life of an organism, the ratio of carbon-14 (C-14) to carbon-12 (C-12) atoms

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