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paul1949

Answer:

Dalton’s Atomic Theory

The main points of Dalton’s atomic theory are:

Everything is composed of atoms, which are the indivisible building blocks of matter and cannot be destroyed.

All atoms of an element are identical.

The atoms of different elements vary in size and mass.

Compounds are produced through different whole-number combinations of atoms.

A chemical reaction results in the rearrangement of atoms in the reactant and product compounds.

Atomic theory has been revised over the years to incorporate the existence of atomic isotopes and the interconversion of mass and energy. In addition, the discovery of subatomic particles has shown that atoms can be divided into smaller parts. However, Dalton’s importance in the development of modern atomic theory has been recognized by the designation of the atomic mass unit as a Dalton.

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Explanation:

Dalton’s atomic theory was a scientific theory on the nature of matter put forward by the English physicist and chemist John Dalton in the year 1808. It stated that all matter was made up of small, indivisible particles known as ‘atoms’.

All substances, according to Dalton’s atomic theory, are made up of atoms, which are indivisible and indestructible building units. While an element’s atoms were all the same size and mass, various elements possessed atoms of varying sizes and masses.

Postulates of Dalton’s Atomic Theory

All matter is made up of tiny, indivisible particles called atoms.

All atoms of a specific element are identical in mass, size, and other properties. However, atoms of different element exhibit different properties and vary in mass and size.

Atoms can neither be created nor destroyed. Furthermore, atoms cannot be divided into smaller particles.

Atoms of different elements can combine with each other in fixed whole-number ratios in order to form compounds.

Atoms can be rearranged, combined, or separated in chemical reactions.

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