Match the items in Column ‘I’ with those in Column ‘II’ correctly.

Matrix:

	Column I		Column II
(i)	Rutherford	(a)	Neutron
(ii)	Neils Bohr	(b)	Electron
(iii)	Chadwick	(c)	Energy shells/orbits
(iv)	Goldstein	(d)	Nucleus
(v)	J.J Thomson	(e)	Canal rays

• In 1911, Rutherford, Marsden, and Geiger discovered the atomic nucleus by bombarding a thin gold sheet with the alpha particles emitted by radium. Rutherford then counted the number of sparks produced by these alpha particles on a zinc sulphate screen.
• Niels Bohr gave a model of the atom in which the electron was able to occupy only certain orbits around the nucleus.
• In 1932, Chadwick made a discovery in the domain of nuclear science: he proved the existence of neutrons – elementary particles without any electrical charge.
• In 1886, E. Goldstein discovered the presence of new radiations in a gas discharge tube and called them canal rays. These rays were positively charged which ultimately led to the discovery of another subatomic particle known as protons.
• In 1897, Thomson discovered the electron and then went on to propose a model for the structure of the atom.

Hence, the correct match is i-d, ii-c, iii-a, iv-e, v-b.