List the two factors that affect ionic bond formations. Describe the trends of one of these factors in the periodic table.
Please help.

Cationic radius.

Charge density.

Explanation:

Across the period, cationic radius is almost constant and charge density increases due to increase in charge magnitude, hence increase decrease in ionic character.

Down the group, cationic radius increases and charge density is constant, hence decrease in charge density which increases the ionic character.

b.

the accuracy of the data.