(i)(a) As most of the a-particles passed through the gold foil undeflected.
(b) A few of the a-particles which are positively charged, deflected due to the positive charge of nucleus.
(ii)(a) Number of neutrons = Mass number - atomic number =32-16 =16
(b) The electronic configuration of the element will be as follows: 2, 8, 6(K,L,M)
Hence, the number of electrons in outermost shell is 6.
(iii) According to Rutherford’s model of an atom, positively charge protons are present in the nucleus of an atom.