1. The particle discovered in the anode ray experiments is the   electron   neutron   proton   meson   Hint Half-n-half Clue   2. The alpha particle scattering experiment was carried out by   E. Goldstein   E. Rutherford   J. Chadwick   J. J. Thomson   Half-n-half Clue   3. The number of protons present in the atom of an element is known as the   Mass Number   Proton Number   Atomic Number   Atomic Weight   Half-n-half Clue   4. The Atomic Theory was given by   J. J. Thomson   James Chadwick   John Dalton   E. Rutherford   Half-n-half Clue   5. The smallest particle of an element which can take part in chemical reactions and may or may not exist independently is the   compound   atom   nucleus   neutron   Half-n-half Clue   6. Atoms of an element with the same number of protons but different number of neutrons in the nucleus are known as   Isotopes   Isobars   Isosters   Twin Atoms   Half-n-half Clue   7. The average mass of an atom of an element is known as   Isotope   Atomic Mass   Atomic Number   Molecular Weight   Half-n-half Clue