Here's why:

* Location on the Periodic Table: Helium is located in Group 18 (VIIIa) of the periodic table, which is the noble gas group. All elements in this group are nonmetals.

* Physical Properties: Helium is a gas at room temperature, colorless, odorless, and tasteless. These are typical properties of nonmetals.

* Chemical Properties: Helium is very unreactive and does not form compounds easily. This inert nature is characteristic of nonmetals.

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