Physics, 01.11.2019 18:31 YesBoi

What is the difference between an atom in the ground state and an atom in an excited state?

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In terms of what you'd see, an atom in the ground state wouldn't emit any light because all the orbital electrons are in their lowest possible energies in the atom.

A ground state atom has its orbiting electrons all in their lowest energy states consistent with, I think, the Pauli (nobel prize winner) exclusion principle and Hund's rules.An excited state atom has one or more electrons in higher energy states - say by thermal agitation (heating them). When these electrons "de excite" back to a lower energy level, they emit electromagnetic radiation in the form of photons. With the correct energy/frequency the photons are visible as a spectrum.

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v 154.9= 0.9 length length s little over 154.9cm

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so here is the information for current research:

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