Saturday, June 15, 2013

Science

Main features of radioactivity: [pic] [pic] [pic] roll up function & Probability parsimony: [pic] [pic] Bohrs toughie: [pic] The Bohr form of the atom, show an negatron quantum jumping to set up state n = 1. In 1913 Niels Bohr proposed a new model of the atom that included guess negatron theatre of operationss. In Bohrs model, negatrons could turn out only certain champaigns close to the atomic nucleus. When an atom emitted (or absorbed) capability, the electron did not move in a continuous trajectory of stairs from virtuoso orbit around the nucleus to another, as mogul be evaluate classically. Instead, the electron would jump instantly from one orbit to another, giving off the emitted light in the miscellany of a photon. The assertable energies of photons given off by apiece element were unconquerable by the differences in zilch amongst the orbits, and so the emission spectrum for separately element would contain a number of lines. Bohr theorised that the angular urge, L, of an electron is quantised: [pic] where n is an integer and h is the Planck constant.
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Starting from this assumption, ampere-seconds law and the equations of poster motion show that an electron with n units of angular momentum will orbit a proton at a outperform r given by [pic], where ke is the carbon constant, m is the mass of an electron, and e is the charge of an electron. For simplicity this is create verbally as [pic] where a0, called the Bohr roentgen, is equal to 0.0529 nm. The Bohr radius is the radius of the smallest allowed orbit. The energy of the electron yowl mug also be calculated, and is given by [pic]. An electron loses energy by jumping straightaway from its original orbit to a tear down orbit; the extra energy is emitted in the form of a photon. Conversely, an electron that absorbs a photon gains energy, hence it jumps to an orbit that is farther from the nucleus. individually photon from ardent atomic hydrogen is referable to an electron contemptible from a higher orbit, with radius rn, to a lower...If you want to subscribe to a full essay, order it on our website: Ordercustompaper.com

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