Respuesta :

inspirationalgdandyt

Answer:

B and D as well

Explanation:

All the electronic configuration of the elements of B end on s sub shell.

S energy level sub shell can hold 2 electrons and since Be, Mg, Ca Sr end in s.

We can say, they have same valence electrons, i.e 2 electrons.

felixcharles333

Answer:

B)

D)

Explanation:

The elements given in V and D have the same number of occupied energy levels.