How does helium differ from the other elements in its family noble gases?

Answer 1

It differs because it only has 2 electrons in its valence shell, and all the other noble gases have 8 electrons.

Answer 2

All noble gases have 8 valence electron, except helium, which has only 2

Answer 3

Helium has 2 valence electrons whereas all other noble gases have 8 valence electrons.

Answer 4

Helium has only 2 outer shell electrons while all the others have 8.

Answer 5

Helium has only 2 valence electrons. All other noble gases have 8 valence electrons.

Answer 6

Helium has 2 electrons in its outer most orbit. Other noble gases have eight valence electrons.

Answer 7

Helium differs because it's only got two electrons in its outer shell. This is, of course, because helium only has one shell.

Answer 8

Helium is the only noble gas that does NOT have a full octet of electrons. It has only 2 electrons.