1. The alpha particle scattering experiment was carried out by   E. Rutherford   J. Chadwick   E. Goldstein   J. J. Thomson   Hint Half-n-half Clue   2. The sum of the numbers of the protons and neutrons in the atom of an element is known as   Isotope Number   Molecular Weight   Mass Number   Atomic Number   Half-n-half Clue   3. The particle discovered as a result of cathode ray experiments is the   neutron   proton   electron   nucleus   Half-n-half Clue   4. Neutron was discovered by   E. Rutherford   E. Goldstein   James Chadwick   John Dalton   Half-n-half Clue   5. The number of protons present in the atom of an element is known as the   Proton Number   Atomic Number   Mass Number   Atomic Weight   Half-n-half Clue   6. The smallest particle of an element which can take part in chemical reactions and may or may not exist independently is the   nucleus   compound   neutron   atom   Half-n-half Clue   7. The Atomic Theory was given by   John Dalton   James Chadwick   J. J. Thomson   E. Rutherford   Half-n-half Clue