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Grade 12th pass9 grade science

The first model of an atom is given by:

Profile image of Harshit Singh
4 Years agoGrade 12th pass
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1 Answer

Profile image of Yash Patari
4 Years ago
DEAR STUDENT
Sir J.J Thomson gave the first model of atom.
He by means of cathode-ray experiment discovered the existence of negatively charged particles in an atom which led to the discovery of electrons. 
He gave the plum-pudding model of an atom in which electrons are embedded in atom-like currants. 
Positive electrons are distributed all over the atom.
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