Is it possible for the atom of an element to have one electron, one proton and no neutron? If so, name the element.
Yes, it is true for hydrogen atom which is represented as 1H1 .
J. Chadwick discovered a subatomic particle which has no charge and has mass nearly equal to that of a proton. Name the particle and give its location in the atom.
The particle is neutron and it is present in the nucleus of the atom.