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Potassium-40 can decay into either calcium-40 or argon-40. all three of these atoms have essentially the same weight. ninety percent of the potassium-40 will decay into calcium-40, and only ten percent will decay into argon-40. when argon-40 is produced by the radioactive decay of potassium-40 inside a rock, the argon-40 produced by the decay is a gas and is trapped inside the rock. the amount argon-40 trapped in a rock can be measured by grinding up the rock and capturing the liberated argon-40 gas. suppose the amount of potassium-40 inside a rock is measured to be 0.81 milligrams, and the amount of argon-40 gas trapped in the rock is measured to be 0.377 milligrams. 1. how much of the potassium-40 that was originally present inside the rock has undergone radioactive decay to produce argon-40?
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Potassium-40 can decay into either calcium-40 or argon-40. all three of these atoms have essentially...
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