Question

John Dalton's Atomic theory and write a report on the relevance of history research on Atom and write the key element of his theory????​

Answer 1

Answer:

A theory of chemical combination, first stated by John Dalton in 1803. It involves the following postulates

(1) Elements consist of indivisible small particles (atoms).

(2) All atoms of the same element are identical; different elements have different types of atom.

(3) Atoms can neither be created nor destroyed.

Explanation:

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Answer 2

• Based on all his observations,Dalton proposed his model of an atom.It is often referred to as the billiard ball model.He defined an atom be a ball like structure,as the concepts of atomic nuclues and the electron were unknown at the time.
• Dalton's atomic theory proposed that all matter was composed of atoms,indivisible and indestructive building blocks.While all atoms of an element were identical,different  elements had atoms of differing size and mass.
• Postulates

                   Elements consist of indivisible small particles(atom).

                   All the atoms of the same elements are identical; different elements have different types of atom.

                    Atoms can neither be created nor destroyed.

• When genetic analysis of his own eye tissues revealed that he was missing the photoreceptor for perceiving the colour green.