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Electrons

Electrons. Ground state electrons lowest possible energy as close to nucleus as possible Excited state electrons have absorbed energy (not lowest) moved farther from the nucleus. Light. Excited electrons emit (lose) a photon of energy to become ground state electrons.

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Electrons

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  1. Electrons • Ground state electrons • lowest possible energy • as close to nucleus as possible • Excited state electrons • have absorbed energy (not lowest) • moved farther from the nucleus

  2. Light • Excited electrons emit (lose) a photon of energy to become ground state electrons. • The emitted energy has a specific wavelength. • If the wavelength falls within the range of 400nm to 700nm (400x10-9m 700x10-9m) our eyes think it is something special.

  3. Calculating energy of a photon Frequency of a wave can be used to calculate energy. E=hν E= energy (Joules, J) h= Plank’s constant (Joule-seconds, Js) 6.62x10-34 v= frequency (cycles per second, 1/s

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