Question

What is group $5a$ called ?

Answer 1

We have to know that, the group $5a$ components have five valence electrons in their most noteworthy energy orbitals $\left( {n{s^2}n{p^3}} \right)$ . Nitrogen, phosphorus, and arsenic can frame ionic mixtures by acquiring three electrons, shaping the nitride, phosphide and arsenide anions, however they all the more habitually structure compounds through covalent holding.

Complete answer:
We have to know that, the gathering $14$ components, the lightest individual from bunch $15$ , nitrogen, is found in nature as the free component, and the heaviest components have been known for quite a long time since they are handily segregated from their metals. Antimony was most likely the first of the pnicogens to be acquired in essential structure and perceived as a component. Its nuclear image comes from its roman name stibium. It is found in stibnite $\left( {S{b_2}{S_3}} \right)$ , a dark mineral that has been utilized as a corrective (an early type of mascara) since scriptural occasions, and it is handily decreased to the metal in a charcoal fire. The Egyptians utilized antimony to cover copper objects as right on time as the third thousand years BC, and antimony is as yet utilized in composites to improve the apparent nature of chimes.
Therefore, the group $5a$ elements are also called pnicogens.

Note:
We have to know that, gathering $5a$ components contain five valence electrons. They have a few distinctive oxidation states. They as a rule structure covalent bonds yet can likewise shape ionic bonds. They incorporate non-metals, metalloids and metals. All are solids at room temperature with the exception of nitrogen.