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23 June, 19:39

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. 23 June, 19:47
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    Around 8,00 to 8,500 years old
  2. 23 June, 21:24
    0
    About 8,500 years old
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