1. Atoms of an element with the same number of protons but different number of neutrons in the nucleus are known as   Isobars   Twin Atoms   Isotopes   Isosters   Hint Half-n-half Clue   2. According to Rutherford, the atom consists of the following two parts   Protons and Neutrons   Nucleus and the extra-nuclear part   Electrons and Protons   Neutrons and Electrons   Half-n-half Clue   3. The charge on the electron was discovered by   J. J. Thomson   Mullikan   Fermi   Faraday   Half-n-half Clue   4. Neutron was discovered by   James Chadwick   E. Rutherford   E. Goldstein   John Dalton   Half-n-half Clue   5. The average mass of an atom of an element is known as   Isotope   Atomic Number   Molecular Weight   Atomic Mass   Half-n-half Clue   6. The number of protons present in the atom of an element is known as the   Proton Number   Atomic Number   Atomic Weight   Mass Number   Half-n-half Clue   7. The sum of the numbers of the protons and neutrons in the atom of an element is known as   Molecular Weight   Isotope Number   Atomic Number   Mass Number   Half-n-half Clue