CHEM 1E03 Chapter Notes - Chapter 5: Coordinate Covalent Bond, Lone Pair, Ionic Bonding
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13 May 2015
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CHEM 1E03 Full Course Notes
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Concepts: review ib notes, covalent bonding: an introduction, polar covalent bonds and electrostatic potential maps, writing lewis structures, resonance, exceptions to the octet rule, shapes of molecules, bond order and bond lengths, bond energies. Ionic bonding occurs between a metal and a non-metal and involves the transfer of electrons from one atom to another. The metal would lose the electron while the non-metal would gain the electron: we measure the strength of an ionic bond using lattice enthalpy. This is defined as the energy released when we take a stoichiometric number of moles of ions in the gas phase and combine them into one mole of a salt, in the solid state. We use this enthalpy when we talk about the born-fajans-haber cycle. The atoms share the electrons because they are both trying to complete their octets. Covalent bonding occurs between two non-metals: all the electrons appear the same, and a line can replace the two dots.
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