CHEM 110 Lecture Notes - Lecture 2: Lewis Acids And Bases, Local Exchange Trading System, Covalent Bond

• School: McGill University
• Department: Chemistry
• Course: CHEM 110
• Professor: Tomislav Friscic

Document Summary

& geometry (10. 7 10. 9: valence bond theory (11. 1 11. 2, hybridization (11. 3 11. 4, molecular orbital theory (11. 5 11. 6, metallic bonding (11. 7) Electronegativity and bonding: transfer of electrons ionic bonds (cid:149) forms neutral salts (ion pairs) in network crystal lattices (cid:149) occurs between atoms of differing electronegativity (difference > 1. 9, sharing electrons covalent bonds (cid:149) forms discrete molecules (each bond = 2 shared electrons) (cid:149) occurs between atoms of similar electronegativity (difference 0 1. 9) Writing lewis structures: draw lewis symbols (show valence electrons) of each atom, pair valence electrons to create a lewis structure, group 4,5,6 atoms usually central , hydrogen and group 7 atoms terminal , make multiple bonds only when necessary, any charges?no move on, The octet rule tendency of an atom to fill valence with eight electrons (atoms lose/share/gain electrons to achieve noble gas electron configurations: elements of the third row and below (cid:149) have more than 4 valence orbitals, can hold more than 8 electrons.