The element with electronic configuration $1{\text{s}}^{2}2{\text{s}}^{2}2{\text{p}}^5$ belongs to

In the given electronic configuration of an element, $1{\text{s}}^{2}2{\text{s}}^{2}2{\text{p}}^5$ the valence shell is 2 (n= 2). So, the element must belong to 2^nd period only. There are total 7 electrons present in its valency shell, so it is a group VIIA element.