Electron was identified by

The  cathode rays was discovered by

The nucleus was discovered by

Maximum number of electrons that can be accommodated in the M shell is 

 Most of the fast moving α-particles passed straight through the gold foil was proposed by

An atom contains 15 protons and has the mass number 31, the number of neutrons is 

The model of an atom to be similar to that of a Christmas pudding was proposed by

The charge of a proton is 

The orbits or shells are also known as 

Doubly charged helium ions is