Indicate the number of protons, neutrons, and electrons in each of the following species: 15 7N, 33 16S, 63 29Cu, 84 38Sr, 130 56Ba, 186 74W, 202 80Hg
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I) Chemistry Notes – 9/18/17 A) Bond dipoles 1) Started off with the energy negativity scale 2) Delta (δ) - Greek symbol for partial energy (a)Ex: H-Br H = δ+ and Br = δ – (i) More EN element pulls () e toward itself and become δ (ii)Less EN element lets go of () e and becomes δ+ This bond is polar and have a dipole (2 oppositely charged poles) Are ionic bonds polar – Yes, they’re the most polar (more so than covalent) B) Lewis structure 1) 2-D reps of atoms, ions, and/or molecules that show all valence electrons (both bonding and non-bonding) (a)Examples are H-H , :C≡O: , :C-C: (i) H-H covalent bond (2 electrons) (ii):C≡O: 3 bonds (i.e.
Author: Raymond Chang; Kenneth Goldsby
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