Which one of the elements has no valence electrons?

Question

Which of the elements below has no valence electrons?
a) Ar+ b) Ga+ c) Mg+2 d) S-2 e) F-

I don't know what it means by "no" valence electrons. Does that mean it has eight, but since it's filled it essentially means 0? Even though, I end up with Mg+2, S-2, and F- as the ones that have 8 valence electrons. But the question didn't say atoms or ions, it said elements. So would I forget about the charges and choose the "element"? What what be the correct choice?

ok, so it means filled up outer shell. but which of teh choices a,b,c,d,e has that? i'm confused

Answer 1

All of the noble gases have no valence electrons. Those would be Helium, Neon, Krypton, Argon, Xenon, Radon. Hope that helps. They all have a full outer shell, meaning that they will not easily lose any electrons and therefore will be unreactive.


The answer is A.

Answer 2

X would most likely gain 3 electrons to become more stable. Y would mostly likely lose 1 electron, readily, to become more stable Z had would most likely gain 3 electrons to become more stable. if X and Z have the same number of valence elctrons, they would be extremely similar in charcteristics and bonding. valence electrons show the element's ability to gain or lose electrons to form bonds. the ability to form bonds is a common trait. these elements are in the same group and therefore very similar.

Answer 3

The valence refers to the charge. Choose the one that behaves as though it has no charge.