electronegativity-elements

electronegativity-elements - Electronegativity...

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Electronegativity Electronegativity δ + δ δ 0 δ 0 H Cl H H
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The basic units: ionic vs. covalent The basic units: ionic vs. covalent Ionic compounds form repeating units. Covalent compounds form distinct molecules. Consider adding to NaCl(s) vs. H 2 O(s): H O H Cl Na Na Cl Cl Cl Na Na H O H H O NaCl: atoms of Cl and Na can add individually forming a compound with million of atoms. • H 2 O: O and H cannot add individually, instead molecules of H 2 O form the basic unit.
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Holding it together Holding it together Q: Consider a glass of water. Why do molecules of water stay together? A: there must be attractive forces. Intramolecular forces occur between atoms Intermolecular forces occur between molecules We do not consider intermolecular forces in ionic bonding because there are no molecules. We will see that the type of intramolecular bond determines the type of intermolecular force. Intramolecular forces are much stronger
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I’m not stealing, I’m sharing unequally We described ionic bonds as stealing electrons In fact, all bonds share – equally or unequally. Note how bonding electrons spend their time: Point: the bonding electrons are shared in each compound, but are not always shared equally. The greek symbol δ indicates “partial charge”. H
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electronegativity-elements - Electronegativity...

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