- An atom is the smallest particle of an element that can take part in a chemical reaction.
- Atoms are so small in size that we cannot see them under the most powerful optical microscope. Their radius is measured in nanometres.
- Atoms usually exist in the form of molecules or ions.
- They are made up of 3 subatomic particles: electrons, protons, neutrons.
- An atom is electrically neutral.
- It has a nucleus which is a small positively charged part placed in the centre. It is surrounded by circular parts called orbits.
Hope you could understand.
If you have any query, feel free to ask.
