1. The volume of the nucleus as compared to the volume of the atom is   75%   50%   25%   Negligible   Hint Half-n-half Clue   2. Atoms of an element with the same number of protons but different number of neutrons in the nucleus are known as   Isobars   Isotopes   Isosters   Twin Atoms   Half-n-half Clue   3. As a result of Rutherford's scattering experiment, it was concluded that   most of the atom is empty.   the center of the atom is empty.   the center of the atom has a negative charge.   atomic mass is spread over the whole atom.   Half-n-half Clue   4. The charge by mass ratio for electrons of various elements   increases with increase in atomic mass.   decreases with increase in atomic mass.   is the same.   increases with increase in atomic number.   Half-n-half Clue   5. Neutron was discovered by   E. Rutherford   E. Goldstein   John Dalton   James Chadwick   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 number of protons present in the atom of an element is known as the   Proton Number   Atomic Weight   Atomic Number   Mass Number   Half-n-half Clue