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24 December, 19:44

Cobalt-60 can be used by scientists for the purpose of radioactive dating. Cobalt-60 has a half-life of 5,272 years. A fossilized rock originally contained 25 grams of Co-60. When tested, the rock only contains 6.25 grams of Co-60. Approximately how old is the item?

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  1. 24 December, 20:09
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    About 8,500 years old
  2. 24 December, 20:10
    0
    Around 8,00 to 8,500 years old
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