An element has Z = 7. What is the valency of the element? Also name the element.

Z=7 (No. of protons = Z)

Therefore, Atomic number = 7

Number of electrons = 7

Electronic configuration is

There are 5 electrons in the outermost orbit. So, in order to complete its octet, the atom will have to gain 3 electrons.

Therefore, the valency of the atom is 3.

The given element is nitrogen.