how would you determine the % of ionic/covalent char. in the bond?

Question

this is on my test review and don't remember learning it

Answer 1

You look up the electronegativity of each element and subtract one from the other. Then do one of the following:
a. Look up the percent ionic/covalent character from a table or graph OR
b. Knowing that a difference of about 1.9 is about 50% ionic/50% covalent character, make an estimate. For example, if the difference is 1.0, then knowing about 2.0 is 50/50 and a difference of 0 is 100% covalent, then 1.0 must be pretty close to 25% ionic/75% covalent character.

Answer 2

thank you so much