CHEM 1111 Lecture Notes - Lecture 7: Bond-Dissociation Energy, Lattice Energy, Covalent Bond

• School: GWU
• Department: Chemistry
• Course: CHEM 1111
• Professor: Wagner Michael

Document Summary

Lewis dot symbols- (cid:272)o(cid:374)sists of the ele(cid:373)e(cid:374)t"s s(cid:455)(cid:373)(cid:271)ol (cid:449)ith dots; ea(cid:272)h dot represe(cid:374)ts a (cid:448)ale(cid:374)(cid:272)e electron: when an atom forms electrons, it is their valence electrons that interact, atoms combine in order to achieve a more stable configuration. Ions can also be represented by lewis structures. Lewis structure- representation of covalent bonding: shared electrons are shown either as dashes or as pairs of dots. Lone pairs are shown as pairs of dots. In a single bond atoms are held together by one electrons pair. In a double bond atoms share two pairs of electrons. Ionic- oppositely charged ions held together by electrostatic attraction: occur between a metal and a nonmetal; these involve ions, m+x- Lewis structures for polyatomic ions are enclosed by square brackets: step 6- if central has less than 8 electrons, move pairs from the termine to form multiple bonds. Resonance structures only differ in the position of their electrons.