Atoms are very reactive species.

So in nature, atoms exist as ions or molecules .

Molecules → Atoms combine to form molecules (Hydrogen, Oxygen, Chlorine, Ozone etc.)

Ions → Atoms or molecule with charge over them are called ions (Fluoride, Chloride, Sodium, Magnesium ions)

There are some atoms that are not reactive. They exist as atoms itself . These are the Noble gases like Helium, Neon, Argon etc. 


  1. Class 9
  2. Chapter 3 Class 9 - Atoms And Molecules (Term 2)

About the Author

CA Maninder Singh's photo - Founder at Teachoo
CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo