Question

What was discovered by Dalton?

Answer 1

John Dalton was an English chemist, physicist, and meteorologist who lived from September 6, 1766, to July 27, 1844. He is best known for introducing the atomic theory into chemistry and for his colour blindness research, which is sometimes referred to as Daltonism after him. Dalton was the first to coin the term "atom" to describe the tiniest particle of matter.

Complete answer
The law of partial pressures was derived by Dalton from his research into the amount of water vapour that could be absorbed by air at various temperatures. As a result, it's only natural that this law is used to correct for the most common errors.
According to John Dalton, the total pressure of a mixture of gases is equal to the sum of the contributions of the individual components of the mixture. The partial pressure of a component is the portion of the total pressure of a mixture that results from that component, according to convention.
$P={P_1}+{P_2}+{P_3}....$
This discovery led to one of his greatest discoveries: all matter is made up of individual particles called atoms. He developed this discovery into his atomic theory.
Atomic Theory in the Modern Era (John Dalton)
Experiments with gases, which became possible around the turn of the nineteenth century, led John Dalton to propose a modern theory of the atom in 1803 based on the assumptions below.
1. Matter is made up of indestructible and indivisible atoms.
2. An element's atoms are all the same.
3. The weights and chemical properties of atoms in different elements differ.
4. Compounds are formed when atoms of different elements combine in simple whole numbers.
5. It is impossible to create or destroy an atom. When a compound decomposes, the atoms return to their original state.

Note:
For his efforts, Dalton received numerous awards. His Quaker upbringing, and the modesty that accompanied it, prompted him to shun public acclaim. He did, however, receive honorary doctorates from Oxford and Edinburgh Universities before his death. The theories Dalton discovered and explored are still used to explain basic chemistry today.