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  • Is Matter Around Us Pure
  • Which one of the following is monoatomic?
Multiple choice

Which one of the following is monoatomic?

  1. Oxygen

  2. Hydrogen chloride gas

  3. Argon

  4. Ammonia

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Argon is a chemical element with symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas.

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