EVERYDAY SCIENCE

Detailed explanation-1: -Thomson’s experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. Thomson proposed the plum pudding model of the atom, which had negatively-charged electrons embedded within a positively-charged “soup."

Detailed explanation-2: -Joseph John Thomson (J. J. Thomson, 1856-1940; see photo at American Institute of Physics) is widely recognized as the discoverer of the electron.

Detailed explanation-3: -Thomson invented the electron by playing with a tube that was Crookes, or cathode ray. He had shown that the cathode rays were charged negatively. Thomson realized that the accepted model of an atom did not account for the particles charged negatively or positively.

Detailed explanation-4: -Sir J. J. Thomson discovered electron but he could only deduce the charge to mass ration but Robert Milikan through his oil drop experiment found the value of charge on electron.

Detailed explanation-5: -In Thomson’s plum pudding model of the atom, the electrons were embedded in a uniform sphere of positive charge, like blueberries stuck into a muffin. The positive matter was thought to be jelly-like, or similar to a thick soup.