'Radioactive carbon 14' presentation slideshows

Geologic Time

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Radioactivity

Radioactivity. (2 nd half of Ch 39). 39.5 Radioactive Half-Life. Radioactive isotopes decay at different rates. The radioactive decay rate is measured in terms of a half-life. The half-life of a substance is the time needed for half of the radioactive atoms to decay.

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Write the name of each layer What is an important property of that layer?

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