Which of the following gases is monoatomic?

Assessment: WAEC SSCE - Chemistry - 2015 (Objective) Subject: Chemistry

Question 1 Report

Which of the following gases is monoatomic?
Answer Details
Argon is the only monoatomic gas among the given options. Monoatomic gases are those that exist as individual atoms, not as molecules. Argon, with atomic number 18, exists as individual atoms and doesn't form molecules. Chlorine, nitrogen, and oxygen are all diatomic gases, meaning that they exist as molecules consisting of two atoms of the same element bonded together. Chlorine has the formula Cl2, nitrogen has the formula N2, and oxygen has the formula O2.
Read lesson note on Kinetic Theory Of Matter And Gas Laws (JAMB)
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