The Plum pudding model was first proposed by physicist from which country?
J. J. Thomson: Sir Joseph John Thomson {'1': ", '2': ", '3': ", '4': "} ( ; 18 December 1856 – 30 August 1940) was an English physicist and Nobel laureate in physics, credited with the discovery and identification of the electron; and with the discovery of the first subatomic particle.
i don't know