Chemistry · Geochemistry

Argon-40, which makes up the bulk of argon in Earth's atmosphere, is produced in the Earth's crust primarily via the radioactive decay of which isotope?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1Rubidium-87
2Carbon-14
3Uranium-238
4Potassium-40✓

Correct answer

Potassium-40

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Argon-40, which makes up the bulk of argon in Earth's atmosphere, is produced in the Earth's crust primarily via the radioactive decay of which isotope?

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Argon-40, which makes up the bulk of argon in Earth's atmosphere, is produced in the Earth's crust primarily via the radioactive decay of which isotope?

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