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Chemistry, 03.02.2020 05:02 googoo4

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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An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition?...
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