CHEM 001 Lecture Notes - Lecture 7: Dmitri Mendeleev, Neon Sign, Incandescent Light Bulb
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7 Aug 2020
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For argon atoms, there are three distinct groups of electrons in each atom whose energies of removal are in the ratio: 1:14:170. Shell model: the evidence for electrons existing at certain distances from the nucleus. Groups of electrons exist in concentric shells about the nucleus of the atom. Electrons that are most difficult to remove lie in the shell closest to the nucleus, and those more easy to remove lie in shells further from the nucleus. Simply represent regions about the nucleus where the electrons are most likely to be found. Only electrons contained in the outermost shell (valence shell) of an atom affect the chemical properties of an element. Maximum number of electrons per shell in atoms equation: 2n^2. There is no upper limit to n. The electron configuration of an atom indicates how its electrons are distributed. Electron configuration: the allocation of electrons to the various shells in an atom.
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