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Krypton-85 has a half-life of 10.76 years. It decays into rubidium-85. Suppose a sample contains 4 atoms of krypton-85 and 12 atoms of rubidium-85. About how old is the sample?
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Krypton-85 has a half-life of 10.76 years. It decays into rubidium-85. Suppose

a sample contains 4 atoms of krypton-85 and 12 atoms of rubidium-85.
About how old is the sample?

User KayoticSully
by
8.0k points

1 Answer

1 vote

Answer:

It’s 21.52 years

Step-by-step explanation:

I just took the test

User Mildre
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