What did JJ Thomson discover about protons?
J.J. 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.”
What experiment did JJ Thomson use to discover the electron?
Development of the Atomic Theory. In 1897, J.J. Thomson discovered the electron by experimenting with a Crookes, or cathode ray, tube. He demonstrated that cathode rays were negatively charged.
What particle did JJ Thomson discover in 1897?
Thomson, in full Sir Joseph John Thomson, (born December 18, 1856, Cheetham Hill, near Manchester, England—died August 30, 1940, Cambridge, Cambridgeshire), English physicist who helped revolutionize the knowledge of atomic structure by his discovery of the electron (1897).
Who discovered proton in chemistry?
Ernest Rutherford showed (1919) that nitrogen under alpha-particle bombardment ejects what appear to be hydrogen nuclei. By 1920 he had accepted the hydrogen nucleus as an elementary particle, naming it proton.
What is an interesting fact about J. J. Thomson?
J. J. Thomson took science to new heights with his 1897 discovery of the electron – the first subatomic particle. He also found the first evidence that stable elements can exist as isotopes and invented one of the most powerful tools in analytical chemistry – the mass spectrometer.
Did JJ Thomson work with other scientists?
Thomson was knighted in 1908, becoming Sir J. J. J. J. Thomson died at age 83, on August 30, 1940. His ashes were buried in the Nave of Westminster Abbey, joining other science greats such as Isaac Newton, Lord Kelvin, Charles Darwin, Charles Lyell, and his friend and former research worker Ernest Rutherford.
Who was the father of proton?
Image: Ernest Rutherford (30 August 1871 – 19 October 1937), discoverer of the proton and the father of nuclear physics. The proton is a massive, positively charged particle made up of two up quarks and one down quark.