According to Dalton’s atomic theory, chemical reactions involve the reorganization of atoms.
Dalton’s atomic theory
In 1808, the English physicist and chemist John Dalton proposed the atomic theory, a scientific theory on the nature of matter. It claimed that all matter is composed of small atoms indivisible particles.
Dalton’s Atomic Theory postulates
The postulates of Dalton’s Atomic Theory are listed below.
- Atoms are small, indivisible particles that make up all matter.
- A particular element’s atoms have the same mass, size, and other properties.
- On the other hand, atoms of different elements have different properties and differ in mass and size.
- Atoms can neither be created nor destroyed. Moreover, atoms are incapable of being split down into smaller particles.
- Atoms of different elements can combine.
- Compounds are made up of atoms from various elements that combine in defined whole-number ratios.
- Chemical reactions allow atoms to be rearranged, merged, or separated.