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What percent of uranium-238 should remain in a sample after 4 billion years?
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An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.
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What percent of uranium-238 should remain in a sample after 4 billion years?...
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