Thorium-229 is the radioactive substance that gives lantern mantels their eerie glow. the half life of thorium-229 is 7340 years. if one mantel consists of 0.25 grams of thorium, how much thorium will remain after 14,680 years? a) 0.0625g b) 0.125g c) 0.25g d) 1.0g
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Thorium-229 is the radioactive substance that gives lantern mantels their eerie glow. the half life...
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