Question

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Answer 1

Answer:

Explanation:

rutherfoeds model of atom states that there is a centre in tne atom which consists most ot the mass of atom. the centre of atom contains neutrons and protons and the electrons are revolving around the nucleus.

the drawback of rutherford model of atom was that he was not able to prove that if the electrons are revolving around in a circular path around the nucleus then they would lose energy and they will fall in the nucleus. but atoms are quite stable. this was the drawback of rutherfords model.

neutron was discoved by James Chadwick

electon was discoveres by J J Thomson

proton ws discovered by Ernest Rutherford

electronic configuration of calcium- (2,8,8,2)

electronic configuration of argon is- (2,8,8)