NASA's Kepler Space Telescope, astronomers have discovered the first Earth-size planet orbiting a star in the "habitable zone" -- the range of distance from a star where liquid water might pool on the surface of an orbiting planet.
Chromatography is the most useful and the latest technique of separation and purification of organic compounds. It was first used to separate a mixture of coloured substances.
(a) Chadwick discovered neutron. Neutron is a neutral particle so it does not have any charge. It is located in nucleus of any atom.
(b) (i)Most of the α -particles passed...
