CHEM 1A03 Study Guide - Final Guide: Electromagnetic Spectrum, Threshold Energy, Roygbiv
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12 Dec 2017
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Atomic structure & theory unit 3 module 1. Speed of light (c) = wavelength ( ) x frequency (v) C = 2. 9979 x 10^8 meters per second (m/s) Roygbiv in the visible spectrum (red, orange, yellow, green, blue, indigo, and violet, but in reverse order) Higher the frequency, so lower the wavelength, means more dangerous. Energy is directly proportional to frequency of the waves (inversely proportional to wavelength) Higher frequency or shorter wavelength is higher energy, and vice versa. Each element has a unique atomic emission spectrum/line spectrum. Electrons can be treated like particles, whose movements are associated with changes in energy. Electrons behave like waves as well as particles, so for waves we have to use quantum mechanics. Qm sho(cid:449) elect(cid:396)ons don"t ha(cid:448)e fixed distances from the nucleus, or fixed locations. Use idea of orbitals: describe regions of space where electrons are likely to be found, orbitals are described by specific quantum numbers.
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