Version 1.0, August 31, 2001, Copyright, Hugh Jack 1993-2001
2.Electropositive - tend to give up electrons in bonding
1.1 to 3 electrons short of full valence level
2.Electronegative - tend to add electrons in bonding
1.Metallic and non-metallic characteristics
3.May gain or lose electrons in bonding
a.Attractive force due to bond
b.Repulsive force due to electron clouds
c.Equilibrium when net force is zero
2.Bonding Energy - Equilibrium when energy is minimum
a.Transfer of electrons from electropositive to electronegative atoms
b.Coulombic attraction between ions
a.Sharing of electrons between 2 (or a few) atoms
b.Number of bonds are those needed to fill valence level
c.Bonds between atoms with similar electronegativities
a.Sharing of electrons among many atoms
b.Valence electrons 'free' to move
a.Temporary, short term shifts in charge creating dipoles
b.Coulombic attraction between dipoles
b.Large differences in attraction for electrons
c.Coulombic attraction between dipoles
a.Special case of polar molecule bonding
b.Dipoles formed between Hydrogen and highly electronegative atoms (e.g. H2O)