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Electron promotion is when an electron absorbs a photon to jump from a low energy level to a higher energy orbital. This is important because when bonds are formed, energy is released and then the system becomes more stable. Thus, atoms provide energy to promote an electron and this would make it into an excited state which then can be solved using hybridization.
505095793 wrote:What does it mean when an electron is promoted? Also, what effect does electron promotion play on the overall molecule or atom?
I don't think this is something we need to know as Dr. Lavelle has not covered this topic in class.
When an electron is promoted it is relocated to a higher energy orbital. Although it takes energy to promote electron, it eventually results in bonding and a more stable molecule. (this is why promotion will only take place if the overall change is towards lower energy). Promotion happens in carbon for example when an electron in the 1s is "promoted" to 2p to allow carbon to make 4 bonds.
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