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when an electron moves from excited state to ground state it emits photons of wavelength equal to the difference between the two energy levels.

Consider a hydrogen atom.

If the electron is at the second energy level in the atom (the energy of this level is -3.4 eV )it can stay there for about only 10^-8 s and then after that it just to the level below .If it jumps from second to ground state (energy of ground state is -13.6 eV) it emits aphoton of energy = 13.6-3.4 =10.2 eV.

.............................Gho$t

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12y ago
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12y ago

It gives off energy, some of which may be in the form of visible light.

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Q: What happens when an electron moves from the excited state to the ground state?
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Does a hydrogen atom expand or contract as it moves from its ground state to an excited state?

i think it contracts because in excited state, electron have more energy and less pull.


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