Answers

2015-10-21T18:30:05+05:30


first the concept of atom was proposed by John DALTON.

secondly it was corrected by J.J.Thomsan


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2015-10-23T09:03:01+05:30
First Sir John Dalton proposed this theory which is popularly known as " Dalton's theory on an atom " in which he said Atom is the smallest particle of an atom .

then Rutherford proposed this theory in which he said about " Protons & electrons " in which he said electrons revolve around a nucleus in a spiral path .

Then Neil Bohr proposed his theory in which he modified about electrons that they follow a circular path not spiral Path
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