Question

Whether is the first element if the group 2 differs from rest if the element

Answer 1

As the s-orbital can accommodate only two electrons, two groups (1 & 2) belong to the s-block of the Periodic Table. ... The elements of Group 2 include beryllium, magnesium, calcium, strontium, barium and radium. These elements with the exception of beryllium are commonly known as the alkaline earth metals.