BBC

1
Electronegativity
-Electronegativity increases from left to right
and increases from top to bottom
2
Chemical Bonding
-If the difference in electronegativity is
between 0 and 0.5, the bond will be nonpolar
covalent -If the difference in electronegativity
is between 0.5 and 2.1, the bond will be polar
covalent -If the difference in electronegativity
is between 2.1 and 3.3, the bond will be ionic
3
Chemical Bonding
Li 0.98
F 3.96
Difference in electronegativity 2.98
-When an electron from an atom with low
electronegativity (like a metal) is removed by
another atom with high electronegativity (like a
nonmetal), the two atoms become oppositely
charged ions that attract, resulting in an ionic
bond.