bonding-ionic-covalent

bonding-ionic-covalent - Bonding Bonding Review: bond...

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Unformatted text preview: Bonding Bonding Review: bond types, bond energy We have been talking about atomic structure, now we are going to focus on molecules There are 2 types of bonding: ionic, covalent From 3A: ionic = stealing of electrons to form +ve and ve ions. +ve and ve then attract Covalent = sharing of electrons We will see that there is no clear dividing line. What causes atoms to form molecules? Basically, all things that happen spontaneously are energetically favorable (a book dropping) You never see a book spontaneously rise Something must be energetically favorable about atoms coming together as molecules We will look at ionic first and then covalent Ionic bonding Ionic bonding involves 3 steps (3 energies) 1) loss of an electron(s) by one element, 2) gain of electron(s) by a second element, 3) attraction between positive and negative + Na e Na + Ionization energy Cl e + Cl Electron affinity Lattice energy + Cl Na + Cl Na + Ionic bonding: energies Ionic bonding: energies Lets keep track of numerical energy values By convention, a requirement for energy is given a + sign (we have to put energy in) and is called endothermic, a release of energy is given a sign and is called exothermic. Ionic bonding...
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This note was uploaded on 04/12/2011 for the course CHEM 1010 taught by Professor Marshall during the Spring '11 term at North Texas.

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bonding-ionic-covalent - Bonding Bonding Review: bond...

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