Question
Two elements $$X$$ and $$Y$$ combine to form a compound $$XY.$$ Under what conditions the bond formed between them will be ionic?
A.
If the difference in electronegativities of $$X$$ and $$Y$$ is 1.9.
B.
If the difference in electronegativities of $$X$$ and $$Y$$ is more than 1.9.
C.
If the difference in electronegativities of $$X$$ and $$Y$$ is less than 1.9.
D.
If both $$X$$ and $$Y$$ are highly electronegative.
Answer :
If the difference in electronegativities of $$X$$ and $$Y$$ is more than 1.9.
Solution :
For the formation of an ionic bond, the electronegativities of two atoms should differ by more than 1.9.