Mention briefly the salient features of Dalton's atomic theory (five points).

The salient features of Dalton's atomic theory are:

1. Matter consists of very small and indivisible particles called atoms.
2. Atoms can neither be created nor be destroyed.
3. Atoms of an element combine in small numbers to form molecules of that element.
4. Atoms of an element combine with the atoms of another element in a simple whole number ratio to form molecules of a compound.
5. Atoms are the smallest unit of matter that take part in chemical reactions during which only rearrangement of atoms takes place.