Metallic elements are described by their standard electrode potential, fusion enthalpy, atomic size, etc. The alkali metals are characerised by which of the following properties?

Options

A. High boiling point
B. High negative standard electrode potential
C. High density
D. Large atomic size

Answer

B, D

Explanation

Alkali merals are the first members in a period. Alkali metals have largest atomic radii in their period due to least effective nuclear charge. They have low density because size is large and mass is least in a period. Alkali metals are soft metals to cut with a knife i.e., low boiling point. Due to ns electronic configuration, they lose electron easily and have high negative standard electrode potential.