NCERT Solutions for Class 9 Science Chapter 3 – Atoms and Molecules
Atom
Atoms are the smallest particles of an element which can take reaction.
Size of an atom: Atomic radius is measured in nanometres.
Atomic radii of hydrogen atom = 1 × 10–10 m.
Molecule
It is the smallest particle of an element or compound which can exist independently.
- Molecules of an element constitute same type of atoms.
- Molecules may be mono-atomic, di-atomic […]
