1. INCREASING IONIC CHARACTER
The IONIC CHARACTER is the difference of electro negativity that exists between 2 atoms in a compound.
The ionic character is used to classify the type of bonding and can be thought of as a measurement of a “tug of war” on the electrons by the atoms.
IONIC:
IONIC CHARACTER IS
1.7 AND ABOVE
INCREASING IONIC CHARACTER
NON POLAR
COVALENT:
IONIC CHARACTER IS
0 TO ABOUT 0.4
POLAR COVALENT:
IONIC CHARACTER IS
0.4 TO ABOUT 1.7

2. Calculating ionic character:
Look up the electronegativities of the elements in TABLE S.
Subtract the electronegativities of only two elements at a time to get the ionic character.
The ionic character is never negative.
If one compound has a high ionic character, it will have a relatively high degree of ionic behavior as compared to a compound with lower ionic character.. The parameters of ionic behavior include:
High melting and boiling points
The formation of hard crystal lattices.
Conductive of electricity in the aqueous states, BUT not conductive in the solid state.

3. ASSESSING AN IONIC COMPOUND
Example: For a compound formed when Ca reacts with F; please elucidate the following;
-The Ionic Character to classify the compound
-The formula (criss cross)
-The Lewis dot structure of the reaction.
The ionic character is
(electro negativity of F) – (electro negativity of Ca) = Ionic character
( 4.0) – ( 1.0) = 3.0, it is VERY ionic.
The Formula is
Ca2+ F1-
Ca2+ F1-
Ca1F2
CaF2

4. Transfer Reaction: F F [ ] - Ca  F [ ] - F
Ca2+