Which is not similar characteristic(s) about the electronic configuration of Be, Mg, Ca ?
CHEMISTRY · Single correct · A Level · Chemistry · Atomic structure · Atomic structure
Problem
Which is not similar characteristic(s) about the electronic configuration of Be, Mg, Ca ?
(1) All the atoms have a pair of s -electrons in their outermost energy level
(2) All the atoms contain a pair of p -electrons in their outermost energy level
(3) All are alkaline earth metals
(4) All are of second group of the periodic table