Question

Ionic bonds normally form between elements with ____ ionization energies and ____ electron affinities.

a. High Low
b Low High
c. High High
d. Low Low

Answer 1

the answer for your question is :-
A compound consisting of an element having a low ionization potential and a second element having a high electron affinity is likely to have.

Source :- http://mattson.creighton.edu/GenChemWeb/Rv/Chm203ReviewPart2.pdf

Answer 2

for more information :-
http://en.wikipedia.org/wiki/Ionic_bonding