Arrange the elements in decreasing order of the number of valence electrons.

Question

Rank from most to least number of valence electrons. To rank items as equivalent, overlap them.

Ar, Be, Mg,S, P, K, N, B,C,Ba,F,Li,Cl,I,Ne

Answer 1

The number of valence electrons can generally be determined by the group number in the periodic table (with the exception of transition elements). Ranking these from most to least valence electrons we would have:

Ar(8) = Ne(8) > F(7) = Cl(7) = I(7) > S(6) > N(5) = P(5) > C(4) > B(3) > Mg(2) = Be(2) = Ba(2) > K(1) = Li(1)