Question

Which of the following illustrate the anomalous properties of Lithium?

• A. Lithium is softer than the other group I metals
• B. Lithium forms nitride, $L{i}_{3}N$ unlike other group I metals
• C. The melting and boiling point of Lithium are comparatively high
• D. none of these

Answer 1

Answer: (B), (C)

Lithium forms nitride, $L{i}_{3}N$ unlike other group I metals
The melting and boiling point of Lithium are comparatively high

Similarities of lithium with magnesium and dissimilarities with that of the other members of the group

Lithium is a very strong element and is equally strong as magnesium.

Li forms $L{i}_{3}N$ with nitrogen.

It has high melting and boiling points. The boiling point of lithium is $1330$ degree centigrade that is comparable to that of magnesium which is $1100$ degrees.

Due to small size, the lithium atom has high ionization energy. Hence, it remains inactive to dry air, slowly reactivity with water, liquid bromine and forms a highly stable hydride unlike other alkali metals.