'Plum Pudding Model' for an atom was proposed by

Which one of the following particles in the nucleus of an atom was discovered by J. Chadwick?

Which one of the following findings is NOT observed in Rutherford's Nuclear Model of Atom ?

For an element with atomic number 35, which one of the following will be the correct number of electrons in its valence shell based on Bohr’s model of an atom?

In an atom, the order of filling up of the orbitals is governed by –

Which one of the following could not explained by Rutherford's nuclear model?