Question

Which of the following pair of element – atomicity is correct?

I. Helium – monoatomic

II. Oxygen – triatomic

A Only II Correct Answer Incorrect Answer
B Both I and II Correct Answer Incorrect Answer
C Only I Correct Answer Incorrect Answer
D Neither I nor II Correct Answer Incorrect Answer

Solution

Helium (He) is an inert gas. Inert gases exist as a monoatomic. Triatomic oxygen (ozone, O3) is a very reactive allotrope of oxygen that is a pale blue gas at standard temperature and pressure

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