Chemistry, 14.07.2019 03:20, coopera1744
Yttrium -90 has a half life of 64 hours . how much of a 120g sample will remain after 128 hours ?
Answers: 1
Chemistry, 22.06.2019 08:00, flakko1899
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.
Answers: 1
Yttrium -90 has a half life of 64 hours . how much of a 120g sample will remain after 128 hours ?...
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