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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 .