CHEM 101 Lecture Notes - Unpaired Electron, Octet Rule, Main-Group Element
Document Summary
Octet rule empiricalrule that broodingly applies to main group element esp period2. Nomenclature binary aft groups 14 18 molecules greekprefix no mono in beginning handsetof element d no change. Iname t greekprefix t 2ndelement base name of monois allowed t ide. First element is always the lower group element example pets. 4202 do not write name for empiricalformula ex. Ionic compounds representedby formula units fixed lowest whole number ratio of cations anions form a crystal lattice of ions this is whyyou can use lowest ratio. Ionic bonds are electrostatic colvombic attraction metal nonmetal. Ii na ii groups 1,2 13 metals metal low ie. Lattice energy quantifiesthe cohesive energy of interaction between rous in a crystalline ionic solid negative de more stable compoundformed. Nomenclature name of cation gtomopeth base name of anion nonmetal ide no prefixes are used. 4th period valence config lose 4s electrons first specify the charge of cation in roman numerals anion charge is fixed.
