CHE 2A Study Guide - Final Guide: Antibonding Molecular Orbital, Google Images, Lewis Structure

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17 Sep 2018
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CHE 2A Full Course Notes
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Both electrons are contributed to one atom. There is either a pole or dipole due to the unequal distribution of electrons. Polarit(cid:455) of a (cid:271)o(cid:374)d = l en l. En < (cid:1005) (cid:373)ea(cid:374)s that it is covalent. En > (cid:1006) (cid:373)ea(cid:374)s that it is ionic. Valence electrons: 1 + 7 + 3(6) We only like formal charges of -1, 0, and 1. Valence electrons: 6 + 4 + 5 + 1 = 16. Stands for valence shell electron shell repulsion. Groups: count electron entity as a whole. For the follo(cid:449)i(cid:374)g e(cid:454)a(cid:373)ples, refer to this ta(cid:271)le if (cid:455)ou ha(cid:448)e(cid:374)"t (cid:373)e(cid:373)orized it (cid:455)et. It"s o(cid:374)l(cid:455) a differe(cid:374)t (cid:374)a(cid:373)e if there are lo(cid:374)e pairs. Definition: imbalance of distribution of electrons in molecule. Different ways to determine whether a molecule is polar. Remember: it must be symmetrical vertically and horizontally! If a molecule is polar, it is/has: Using symmetry to determine polarity: draw lewis dot structure, draw its shape, polarity! (whether it is symmetrical)

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