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Created page with "==Key Stage 5== ===Meaning=== De-excitation is the process in which an atom loses energy by photon emission as a result of an electron moving from..."
==Key Stage 5==
===Meaning===
[[De-excitation]] is the process in which an [[atom]] loses [[energy]] by [[photon]] [[Emit|emission]] as a result of an [[electron]] moving from one [[Energy Level|energy level]] to an unoccupied position in a lower [[Energy Level|energy level]].
===About De-excitation===
*'''De-excitation''' occurs when an [[electron]] in a higher [[Energy Level|energy level]] falls to a lower [[Energy Level|energy level]].
*The energy difference between the two levels is [[emit]]ted as a [[photon]].
*The [[emit]]ted [[photon]] has an [[energy]] exactly equal to the [[energy]] difference between the levels.
*'''De-excitation''' is the reverse of [[excitation]], where [[energy]] is [[Absorb (Physics)|absorbed]] to move an [[electron]] to a higher level.
*Important in the study of atomic spectra and the identification of [[element]]s.
===Examples===
*The [[Emit|emission]] of [[Visible Light|light]] in [[neon]] signs is due to the '''de-excitation''' of [[electron]]s in [[neon]] [[atom]]s.
*'''De-excitation''' of [[electron]]s in [[hydrogen]] [[atom]]s produces the characteristic lines of the [[hydrogen]] [[Emission Spectra|spectrum]].
===Meaning===
[[De-excitation]] is the process in which an [[atom]] loses [[energy]] by [[photon]] [[Emit|emission]] as a result of an [[electron]] moving from one [[Energy Level|energy level]] to an unoccupied position in a lower [[Energy Level|energy level]].
===About De-excitation===
*'''De-excitation''' occurs when an [[electron]] in a higher [[Energy Level|energy level]] falls to a lower [[Energy Level|energy level]].
*The energy difference between the two levels is [[emit]]ted as a [[photon]].
*The [[emit]]ted [[photon]] has an [[energy]] exactly equal to the [[energy]] difference between the levels.
*'''De-excitation''' is the reverse of [[excitation]], where [[energy]] is [[Absorb (Physics)|absorbed]] to move an [[electron]] to a higher level.
*Important in the study of atomic spectra and the identification of [[element]]s.
===Examples===
*The [[Emit|emission]] of [[Visible Light|light]] in [[neon]] signs is due to the '''de-excitation''' of [[electron]]s in [[neon]] [[atom]]s.
*'''De-excitation''' of [[electron]]s in [[hydrogen]] [[atom]]s produces the characteristic lines of the [[hydrogen]] [[Emission Spectra|spectrum]].