Q16 of 39 Page 288

Arrange the following

LiH, NaH and CsH in order of increasing ionic character.

Ionic character of compound depend upon the electronegativity of the atoms present in the compound. Higher the difference between electronegativity of atoms, smaller is the ionic character.

On moving down the group, the electronegativity decreases and hence, the ionic character of their hydrides will increase as shown below.


LiH < NaH < CsH


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