Search results
Thomson atomic model, earliest theoretical description of the inner structure of atoms, proposed about 1900 by William Thomson (Lord Kelvin) and strongly supported by Sir Joseph John Thomson, who had discovered (1897) the electron, a negatively charged part of every atom. Though several alternative models were advanced in the 1900s by Kelvin ...
- The Editors of Encyclopaedia Britannica
The British physicist Joseph John “J. J.” Thomson (1856–1940) performed a series of experiments in 1897 designed to study the nature of electric discharge in a high-vacuum cathode-ray tube, an area being investigated by many scientists at the time. Thomson interpreted the deflection of the rays by electrically charged plates and magnets ...
Sir Joseph John Thomson OM FRS [1] (18 December 1856 – 30 August 1940) was a British physicist and Nobel Laureate in Physics, credited with the discovery of the electron, the first subatomic particle to be found.
Thomson atomic model was proposed by William Thomson in the year 1900. This model explained the description of an inner structure of the atom theoretically. It was strongly supported by Sir Joseph Thomson, who had discovered the electron earlier. During cathode ray tube experiment, a negatively charged particle was discovered by J.J. Thomson.
- 32 sec
- It was discarded because he was unable to precisely account for the stability of the atom. He proposed that electrons are distributed in the atom i...
- The following are the characteristics of the Thomson model of an atom: (i) An atom is made up of a positively charged sphere in which electrons ar...
- According to Thomson’s atomic model, an atom is made up of a positively charged sphere into which negatively charged electrons are implanted. Becau...
- The model was compared to a watermelon because the red edible part of a watermelon was compared to the sphere with a positive charge, and the black...
- His model lacked a nucleus, protons, and neutrons.
Thomson also placed two magnets on either side of the tube, and observed that this magnetic field also deflected the cathode ray. The results of these experiments helped Thomson determine the mass-to-charge ratio of the cathode ray particles, which led to a fascinating discovery − the mass of each particle was much, much smaller than that of any known atom.
- The angle of deflection in the thomson experiment depends on the e/m value. This is because F = ma So a = F/m F is proportional to e So a is propor...
- @Afeefdk Because they very different experiments...Look at both the experiments. In the Thomson's experiment, J.J Thompson didn't strike the cathod...
- Rutherford was interested in radio-chemistry (radioactivity) and what it might reveal about the atom. is focus was on alpha particles (from alpha r...
- Because he used classical physics (although he quantized the angular momentum) to conceive his model....and classical physics is based on intuitive...
- The negatively charged electrode is the anode, this is where the electrons in a current originate. The positively charged electrode is the cathode...
- He put the radium in a container with only one 'hole' for the alpha particles to get out. Any alpha particles going in other directions simply don'...
- You are right, both kinds of rays are emitted simultaneously. the cathode rays consist of electrons, while the anode/canal rays are the positively...
The plum pudding model is an obsolete scientific model of the atom. It was first proposed by J. J. Thomson in 1904 [1] following his discovery of the electron in 1897 and subsequently rendered obsolete by Ernest Rutherford 's discovery of the atomic nucleus in 1911. The model tried to account for two properties of atoms then known: that there ...
People also ask
Who proposed the Thomson atomic model?
Which atomic structure model was used by Thomson & Rutherford?
Why is Thomson atomic model compared to watermelon?
Why is Thomson's model important?
Feb 2, 2020 · In 1906, Thomson demonstrated a hydrogen atom had only a single electron. Thomson's father intended for J.J. to be an engineer, but the family did not have the funds to support the apprenticeship. So, Joseph John attended Owens College in Manchester, and then Trinity College in Cambridge, where he became a mathematical physicist. In 1890 ...
Searches related to joseph john thomson model of atom
