Question

How to find least ionic among following
a)caf2
b)cabr2
C)cal2
Process please

Answer 1

hello

greater the electronegativity difference more is the ionic character

electronegativity decreases doen a group .

therefore Fluorine is most electronegative

so CaF2 is most ionic

Answer 2

The least ionic among the following is an option (C) CaI2.

• Least ionic means the most covalent compound.
• The covalent character can b determined by Fajan's rule.
• It states that the larger the size of the anion and the smaller the size of the cation larger is the covalent character and the smaller will be the anionic character.
• It also includes the oxidation state, as the higher the oxidation state higher the covalent character will be.
• CaF2, CaBr2 and CaI2 all have the same oxidation state which is +2 and the same cation. so, anion size will be determining factor for the covalent character.
• Out of CaF2, CaBr2 and CaI2, iodine is the largest anion so calcium iodide CaI2 is the most covalent compound and least ionic.