CHEM 102 Lecture Notes - Lecture 7: Ionic Bonding, Noble Gas, Covalent Bond
Document Summary
All want to lose electrons, and become like the last noble gas (sans hydrogen, he want to be like helium) ns2np4, ns2np5. All want to gain electrons, and become like the next noble gas. Together, in an ionic bond, they achieve the nearest ns2np6 configuration. Ionic compounds easily disassociate in water and dissolve. The anion steals an electron and just attracts the cation. Formula units - since ionic bonds usually occur in crystalline structures, there"s no defined pair of ions, but there exists a ratio, and that is what we take as a formula unit. Ionic compounds are poor conductors of electricity until dissolved in water, where the ions are spaced freely and the opposite is true. The energy minimum for attraction and repulsion gets smaller as the atoms get closer, up to the . Between atoms in a bond, there exists a certain distance that cannot be exceeded without putting insane amounts of energy.
