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Chemistry, 19.02.2021 21:40 mia3128

The half-life of thorium-232 is 14 billion years. A rock with 50% of its thorium-232 remaining is: 3.5 billion years old. 14 billion years old. 28 billion years old.

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The half-life of thorium-232 is 14 billion years. A rock with 50% of its thorium-232 remaining is: 3...
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