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Lih, Nah and Csh in Order of Increasing Ionic Character. - Chemistry

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ConceptHydrides Covalent Or Molecular Hydride

Question

Arrange the following

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

Solution

The ionic character of a bond is dependent on the electronegativities of the atoms involved. The higher the difference between the electronegativities of atoms, the smaller is the ionic character.

Electronegativity decreases down the group from Lithium to Caesium. Hence, the ionic character of their hydrides will increase (as shown below).

LiH < NaH < CsH

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Solution Lih, Nah and Csh in Order of Increasing Ionic Character. Concept: Hydrides - Covalent Or Molecular Hydride.
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