Question

what will be the group number of element A having three electrons in its outermost shell??
most of the answers I received is 13 group why 3 group is not the answer???​

Answer 1

Answer:

If three shells → element belongs to third period. If three valence electrons → element belongs to 13 groupRead more on Sarthaks.com - https://www.sarthaks.com/287560/state-the-group-period-the-element-having-three-shells-with-three-electrons-valence-shell