Question

What is the valence electron configuration for the Group $\mathbf{3}\mathit{A}$elements? How does metallic character change as one goes down this group? How are boron and aluminium different?

Short answer

The valence electron configuration of Group$3A$elements is.$n{s}^{2}n{p}^1$

The metallic character is increases from boron to aluminium.

Boron is network covalent metalloid whereas aluminium is more metallic. Boron has high melting point and aluminium has a lower melting point.

Step-by-step solution

Definition of valence electron

The electrons in an outermost shell of atom, or energy level, are known as valence electrons.

Find the valence electron configuration for the Groupelement

The initial group in the$p$block is$3A$.

Group 3A elements have a valence electron configuration of$n{s}^{2}n{p}^1$.

The sort of bonding that occurs in the element has an impact on its physical qualities.

Boron is a network covalent metalloid that is black in colour, hard to deal with, and has a high melting point.

Metals, on the other hand, are gleaming, comparatively soft, and low-melting.

Also, as the Group$3A$components become bigger, the metallic aspect gets stronger.

Although aluminium is typically thought of as a metal, it has certain non-metallic characteristics due to its substantial covalent nature in its connections with other non-metals.