Why is Helium considered a stable element?

Question

Because it has 12 valence electrons.

Because it has 2 valence electrons.

Because it has 8 valence electrons.

Because it has no valence electrons.

Answer 1

Helium is considered a stable element because it has 2 valence electrons.

Helium is a noble gas and has a complete outer shell with 2 electrons in its first (and only) energy level. This configuration makes it very stable and unreactive, as it does not tend to gain, lose, or share electrons with other elements. In contrast to other noble gases, which typically have full outer shells of 8 electrons, helium's shell is complete with just two. Thus, the correct choice is:

Because it has 2 valence electrons.