the two elements are berrylium and

magnesium

Electovalency is 2

electronic configuration

1)1s^ 2 2s^ 2

2)1s^ 2 2s^ 2 2p^ ^ 6 3s^ 2they belong to same group ie group no.2 there chemical and physical properties are similar that is why they are placed in same group...Alkali metals or alkaline

I think all alkali earth metals show same

earth metals... hope it helps