J.J. Thomson by Nicholas West and Matthew Williams.

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Presentation transcript:

J.J. Thomson by Nicholas West and Matthew Williams

Introduction He was a British physicist He was credited for discovering 1.Electrons 2.Isotopes 3.Inventing the mass spectrometer

Early Life Joseph John Thomson was born at Cheetham Hill, England, near Manchester, in Dec His parents were Emma Swindells and Joseph James Thomson. J.J. Farther was a bookseller who wanted him to become an engineer.

Education When Thomson could not find an apprenticeship at an engineering firm, he was sent to bide his time at Owens College at the age of 14. In 1876, he received a small scholarship to attend Trinity College at Cambridge to study mathematics.

Research In 1894, Thomson began studying cathode rays (which are glowing beams of light that follow an electrical discharge) in a high-vacuum tube. When the rays pass though through the vacuum, he was able to measure the angle at which they were deflected and calculate the ratio of the electrical charge to the mass of the particles.

Thomson's Experiment

His studies Thomson discovered that the ratio was the same regardless of what type of gas he used, which led him to conclude that the particles that made up the gases were universal. He determined that all matter is made up of tiny particles that are in smaller than atoms.

Results He originally called these particles ‘corpuscles,’ although now we know them electrons. Thomson imagined that atoms are made up of these ‘corpuscles’ orbiting in a sea of positive charge. He called it the plum pudding model.

Awards and recognition Thomson received many awards for his discovery such as 1.Royal Medal in Hughes Medal in The Nobel Prize for Physic in Knighted by King Edward VII in Elliott Cresson Medal in Franklin Medal in Scott Medal in 1923

Later Life Thomson married Rose Paget, one of his students, in They had named Joan and one son named George Thomson. He left research in 1918 to become Master of Trinity College. He died in Cambridge on August 30, 1940, and is buried in Westminster Abbey.

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Questions What was Thomson’s model called? A. The apple model B. The plum pudding model C. The cookie model What field did Thomson received the Nobel in? A. Physics B. chemistry C. literature D. Physiology When was Thomson Knighted? A B C D What did Thomson discover? A. Protons B. Electrons C. Neutrons D. Atoms Who is Thomson buried near? A. King Edward B. Lincoln C. Isaac Newton D. Elvis Presley

Work cited s/laureates/1906/thomson-bio.html thomson shtml html