Question

Helium is an unreactive gas? Why?

Answer 1

Answer:

Helium is a colorless, odorless, unreactive gas which liquefies at -268.97°C (4.18 K).

Explanation:

Solution. Both helium (He) and neon (Ne) have filled outermost shells. Helium has a duplet in its K shell, while neon has an octet in its L shell.

Answer 2

Answer:

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