Question

7. Which of the following is an inert gas?
Hydrogen
Helium
Oxygen
Chlorine

Answer 1

Answer:

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✒ Helium ✔

Answer 2

Answer:

Helium

Explanation:

Inert gases won't react with any other elements easily because their outermost orbit was completely filled with electron as a result of it it won't takes parts in the chemical reaction.