Question

Compared with Group 2 elements, Group 14 elements have

less electronegativity
more valence electrons
more isotopes

Answer 1

Well if you look at an electronegativity chart elements in group 14 have a greater electronegitivity... so it is not A.
As for B, Valence electrons are how many electrons are in the outer shell.... But elements in group 14 can give and receive electron readily. so that does not always mean it has more electrons that those in Group 2.
So that leaves C as the answer.... This is because isotopes is just a fancy way of saying the different forms of the same element. For example, there is Carbon-12 and Carbon-14.... and many more.... But More Isotopes is the answer!

Answer 2

thanks !!!

Answer 3

no problem @SimplyDanii