Question

State the contributions of:
John Dalton-towards the development of Chemistry

Answer 1

Hint: We have to know that John Dalton was an English physicist, chemist. We have to know that John Dalton devised the modern explanation for the basic building units of chemical structure. He also devised the basic laws in chemistry by expanding and observing the works of Joseph Proust and Antoine Lavoisier.

Complete answer:
We have to know that John Dalton was a scientist who utilized the term atom, which is the smallest particle of matter. The term “atom” originates from the Greek word “atomos” indicating that atoms could not be divided again. We can say that the following are the postulates of John Dalton as,
We have to know that elements which are minute and indivisible particles are atoms.
We have to know that atoms of the same element are made up of the same mass and the same size.
We have to know that atoms of dissimilar elements are made up of different masses and different sizes.
We have to know that the combination of two atoms (or) more atoms of several elements forms chemical compounds.
We have to know that atoms of two elements could combine in various ratios to give rise to more than one compound.
We have to know the combination of atoms to give compounds in simple numerical ratios.
We have to know that the John Dalton model of atoms is used to describe the behavior of molecules, atoms, and compounds. We have to know that the atomic model devised by Dalton is highlighted in the progress of chemistry.

Note:
We have to know that atomic theory has been revised over the years to include the existence of isotopes and for the conversion of energy and mass. We have to know that the discovery of subatomic particles shows that atoms could be divided into smaller parts. But, the importance of Dalton’s model in the progress of modern atomic theory has been identified by designing the atomic mass unit as Dalton.