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excited state: state in which an atom or molecule picks up outside energy, causing an electron to move into a higher-energy orbital.
So it would be emitting... show more An atom of oxygen is in an excited state. When an electron in this atom moves from the third shell to the second shell, energy is. 1. emitted by the nucleus. 2. emitted by the electron. 3. absorbed by the nucleus. 4. absorbed by the electron.