Question

Which is correct answer​

Answer 1

Answer:

in this nucleus of atomis a correct answer because in the force rutherford's Alpha particle experiment he used Alpha particles which are usually A positively charged so here he get to know that the Alpha particles which are positively charged just return back from the centre of the atom it means that there is some something concentrated in the centre of the atom so eager to know that there is something in the centre which is termed as neutron on nucleus of the atom