Question

The density of a ionic hydride of a group 1 element will be the density of the metal.

• A. higher than
• B. lesser than
• C. same as

Answer 1

The correct option is A higher than

Almost all of group 1 elements and some of group 2 elements form ionic hydrides.
In ionic hydrides, hydride ions occupy the holes present in lattice of the metal.
Hence these ionic hydrides have greater density when compared to the metals from which they are formed.