electronegativities
F
4.0
5
penta
2 electron groups, 180
linear
EN > 2.0
ionic bond
share electrons equally
polar covalent
H
2.1
8
octa
3 electron groups (all atoms), 120
trigonal planar
EN < 0.5
nonpolar covalent
electrons shared between 2 atoms
bonding electrons
Li
1.0
mono
4 electron groups (all atoms), 109.5
tetrahedral
0.5 < EN < 0.2
polar covalent
an atoms ability to pull shared electrons towards itself
electronegativity
B, C, N, O
2.0, 2.5, 3.0, 3.5
7
hepta
3 electron groups (2 atoms, 1 lone pair)
bent
only one polar bond
polar molecule
Name this compound: P3O4
triphosphorous tetraoxide
Br
2.8
4
tetra
4 electron groups (3 atoms, 1 lone pair)
# e groups = # of equal or identical polar bonds
nonpolar molecule
any atom except H or C
heteroatoms