John dalton developed the concept of atom & gave the world a theory regarding the constituent particles of matter.
Postulates of Dalton's Atomic theory:-
1) According to his theory , all matter is composed of very tiny minute particles called atoms.The smallest particle of an element was named as "simple atom " that of an compound was name as "compound atom".
2)Atoms are indivisible cannot be divided by any physical or Chemical means .
3)Atoms of the same element are identical in all respect & atoms of different elements are different in all respect.
3)Atoms can take part in chemical reactions , they combine in simple ratio of whole numbers to form compounds
[when we say atom we mean "simple atom"]
Hence the def:-The smallest indivisible indestructible Particle which may or may not take part in a chemical reaction.
But later on with the farther advances of Science this theory was gradually proved to be obsolete and was finally discarded with the breakthrough inventions of the Sub-atomic particles.
The notable of all the atomic sub-particles are - Neutrons , Protons and Electrons.
Postulates of Dalton's Atomic theory:-
1) According to his theory , all matter is composed of very tiny minute particles called atoms.The smallest particle of an element was named as "simple atom " that of an compound was name as "compound atom".
2)Atoms are indivisible cannot be divided by any physical or Chemical means .
3)Atoms of the same element are identical in all respect & atoms of different elements are different in all respect.
3)Atoms can take part in chemical reactions , they combine in simple ratio of whole numbers to form compounds
[when we say atom we mean "simple atom"]
Hence the def:-The smallest indivisible indestructible Particle which may or may not take part in a chemical reaction.
But later on with the farther advances of Science this theory was gradually proved to be obsolete and was finally discarded with the breakthrough inventions of the Sub-atomic particles.
The notable of all the atomic sub-particles are - Neutrons , Protons and Electrons.
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