How many valence electrons does helium have?

Helium is located in period 1, group 18 of the , and has an equal to 2. As a result, neutral helium will only have 2 electrons surrounding its nucleus.

are the electrons located in an atom's outermost shell. In helium's case, both its electrons will be .

Its can be used to better show this

##"He" = 1s^(2)##

Two electrons in its outermost (and only) shell, two .