According to Dalton's atomic theory, the smallest particle from which matter is made up of is called as:
DALTON'S ATOMIC THEORY :
1. Matter is made up of very small indivisible particles called atoms.
2. All the atoms of a given element are identical in all respect i.e. mass, shape, size, etc.
3. Atoms cannot be created nor destroyed by any chemical process.
4. Atoms of different elements are different in nature.