Question

The elements of which group are nonreactive?

Answer 1

The elements react with other element and form compounds in order to complete their octet (possess 8 electrons in their valence shell) and attain stability. The formation of compounds by the elements can take place by either sharing of electrons or transfer of electrons from one atom to other atom. The elements whose octet is complete that means those elements which has eight electrons in their valence shell are nonreactive as they are already stable due to completion of octet.

In periodic table, the elements of group 18 (Noble gas) have their octet completely filled and are stable in the elemental form. Thus, the elements of group 18 (helium, neon, argon, krypton, xenon, radon, and oganesson) are nonreactive.

Answer 2

Noble gases, on the right hand side of the periodic table
( argon, xenon, etc...)