What is the general valence-electron ground-state electron configuration for neutral alkaline earth metals? A) ns2 B) 1s22s2 C) 1s22s1 D) ns1
1 Answer
A)
For the main group elements, groups 1, 2, 13-18, the valence electrons are in the outermost s and p sublevels. The alkaline metals are in group 2, which means they have 2 valence electrons in their outermost s sublevel.
The ground state electron configurations for the six alkaline earth metals in group 2 are:
Period 2, Be:
Period 3, Mg:
Period 4, Ca:
Period 5, Sr:
Period 6, Ba:
Period 7, Ra: