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Whitepunk [10]
4 years ago
3

A substance is on its fifth half-life. Which approximates the percentages of radioactive and stable isotopes, respectively? 96.9

%; 3.1% 3.1%; 96.9% 12.5%; 87.5% 87.5%; 12.5%
Biology
1 answer:
Hitman42 [59]4 years ago
3 0
The answer is 3.1%; 96.9%. The formula to find the remaining radioactive material is (1/2)ⁿᵘᵐᵇᵉʳ ᵒᶠ ʰᵃˡᶠ⁻ˡᶦᵛᵉˢ, meaning (1/2)⁵ is 0.031. Converting this to a percentage, 3.1% is the remaining radioactive material while 96.9% is the percentage of the stable isotopes.
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