Question

Some of the physical properties used to distinguish between the three groups are: _________

Answer 1

Luster = the ability of a substance to reflect light. ...
Conductivity = the ability of the substance to conduct electricity. ...
Malleability = the ability of the substance to be hammered into sheets without breaking.

Answer 2

The Group 3A metals have three valence electrons in their highest-energy orbitals (ns2p1). They have higher ionization energies than the Group 1A and 2A elements, and are ionized to form a 3+ charges. The Group 3A metals are silvery in appearance, and like all metals are good conductors of electricity.