atomicModel - ATOMIC MODEL -- Electrons (e ) exist in...

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Unformatted text preview: ATOMIC MODEL -- Electrons (e ) exist in shells Shell no. = n ( n = 1, 2, 3 ) Chemical properties are determined by e in outer shell (valence shell). Valence e s = e in outer shell or valence shell Use dot as symbol for valence electrons Shell Max No. Core e = e inside valence shell (play minor No: of e : role in chem. bond) n = 1 2 n = 2 8 n = 3 18 Z = No. protons in nucleus Z = Positive nuclear charge Z = No. e in neutral atom Charge on atom = 0 The first ionization energy (I 1 = IE 1 , Z, p 560) is the minimum amount of energy required to remove the most loosely bound electron from an isolated gaseous atom to form an ion with a +1 charge: Initial State Final State Electron affinity (EA) (Z p564) of an element is defined as the amount of energy involved in the process in which one mole of electrons is added to one mole of isolated gaseous atoms to form ions with a (1) charge....
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atomicModel - ATOMIC MODEL -- Electrons (e ) exist in...

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