CHEM 101 Lecture Notes - Lecture 3: Electron Configuration, Pauli Exclusion Principle, Alkali Metal
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16 Oct 2017
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Photo: a bundle of energy that moves at the speed of light. Emission: the atom gives off energy (as a photon) Excitation: the atom absorbs energy that is exactly equal to the different between energy levels. Ground state: electron in their lowest possible energy levels. Excited state: electron promoted to any level n>1 by energy absorption. Relaxation: electron drop back down to the ground state by energy emission. Energy levels are quantized = can have only certain values. In nature, energy goes from high to low. E = -2. 179 x 10^-18 j ((1/nf^2) - (1/ni^2)) Conservation of energy: - e electron relaxation = e photon. Quantum mechanical model of the atom (erwin schrodinger: electrons have wave-like properties in some experiments. Light has particle-like behavior (photons) in some other experiments. Bohr"s model: electron moves as particles, following the rules of classical mechanics.
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