What is the principal quantum number for third excited state?Answer the given question in brief.
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When an electron absorbs energy, it occupies a higher energy orbital, and is said to be in an excited state.
A hydrogen atom is in its third excited state, with principal quantum number 4.
The atom emits a photon with a wavelength of 487 nm.
The principal quantum number (n) describes the electron shell, or energy level, of an electron.
The value of n ranges from 1 to the shell containing the outermost electron of that atom, i.e. n = 1, 2, ...
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