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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.
- The Editors of Encyclopaedia Britannica
An atom with seven electrons, arranged in a pentagonal dipyramid, as imagined by Thomson in 1905. The plum pudding model is an obsolete scientific model of the atom. It was first proposed by J. J. Thomson in 1904 following his discovery of the electron in 1897, but before Ernest Rutherford discovered the atomic nucleus in 1911. The model tried ...
Key points. J.J. Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. Thomson's plum pudding model of the atom had negatively-charged electrons embedded within a positively-charged "soup."
- How can we calculate e/m value of elactron?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...
- comparing thomsons exp. and rutherford's exp. why does the rays deflect in rutherford's model due to...@Afeefdk Because they very different experiments...Look at both the experiments. In the Thomson's experiment, J.J Thompson didn't strike the cathod...
- In th Rutherford experiment, why did he use alpha particles ( He2+) ? wouldn't it have been better i...Rutherford was interested in radio-chemistry (radioactivity) and what it might reveal about the atom. is focus was on alpha particles (from alpha r...
- How Rutherford told that atom is like a solar system?on which base ?Because he used classical physics (although he quantized the angular momentum) to conceive his model....and classical physics is based on intuitive...
- why did we have to name positive ions cations and not anions, since most of the naming in science se...The negatively charged electrode is the anode, this is where the electrons in a current originate. The positively charged electrode is the cathode...
- How did Rutherford make the alpha particles of helium and how did he concentrate those particles so ...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'...
- is anode rays consist of proton ?You are right, both kinds of rays are emitted simultaneously. the cathode rays consist of electrons, while the anode/canal rays are the positively...
His experiments to determine the nature of positively charged particles, with Francis William Aston, were the first use of mass spectrometry and led to the development of the mass spectrograph. [2] [3] Thomson was awarded the 1906 Nobel Prize in Physics for his work on the conduction of electricity in gases. [4]
- George Paget Thomson, Joan Paget Thomson
- Trinity College, Cambridge
Concepts of Thomson's atomic model along with the postulates and drawbacks. Plum pudding model by J.J Thomson, atomic structure pdf. Visit to learn more and get downloadable files.
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- Why was Thomson’s atomic model discarded?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...
- What is the important feature of Thomson atomic model?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...
- Which model best explains the atom’s neutrality?According to Thomson’s atomic model, an atom is made up of a positively charged sphere into which negatively charged electrons are implanted. Becau...
- To which fruit has Thomson’s model been compared to?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...
- What was missing from Thomson’s atomic model?His model lacked a nucleus, protons, and neutrons.
Jan 19, 2016 · This was the basis of the atomic theory devised by English physicist J.J. Thompson in the late 19th an early 20th centuries. As part of the revolution that was taking place at the time,...
Jun 14, 2021 · Therefore, scientists set out to design a model of what they believed the atom could look like. The goal of each atomic model was to accurately represent all of the experimental evidence about atoms in the simplest way possible. Following the discovery of the electron, J.J. Thomson developed what became known as the "plum pudding" model in 1904 ...
