Question

Atoms that have the same number of outer electrons...

a.) are all nonmetallic elements
b.) are all metallic elements
c.) must be atoms of the same element
d.) belong to the same family of elements

Answer 1

d.) belong to the same family of elements

Step-by-step explanation:

All atoms of elements present in same group having same number of valance electrons. Thus the elements in same group having same properties.

For example:

Consider the second group. It consist of alkaline earth metals. There are six elements in second group. Beryllium, magnesium, calcium, strontium, barium and radium.

All have two valance electrons.

Electronic configuration of Beryllium:

Be = [He] 2s²

Electronic configuration of magnesium.

Mg = [Ne] 3s²

Electronic configuration of calcium.

Ca = [Ar] 4s²

Electronic configuration of strontium.

Sr = [Kr] 5s²

Electronic configuration of barium.

Ba = [Xe] 6s²

Electronic configuration of radium.

Ra = [ Rn] 7s²