Among $LiH$ , $NaH$ , $KH$ and $CsH$ , which hydride has the highest ionic character?

A $KH$
B $LiH$
C $NaH$
D $CsH$

Answer: D

Ionic character depends on the electronegativity difference between metal and hydrogen. Electropositive character increases down group 1, so the difference is largest for Cs and

CsH

is the most ionic.

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Among LiH, NaH, KH and CsH, which hydride has the highest ionic character?

Answer: D

More questions on Hydrides and solutions in liquid ammonia

Among $LiH$ , $NaH$ , $KH$ and $CsH$ , which hydride has the highest ionic character?