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4 days ago · How did J.J. Thomson’s discoveries contribute to modern physics? Thomson’s discoveries, particularly the electron, revolutionized our understanding of atomic structure and laid the foundation for subsequent advancements in quantum mechanics and atomic theory.
2 days ago · Thomson also showed that electrons were identical to particles given off by photoelectric and radioactive materials. Thomson explained that an electric current is the passing of electrons from one atom to the next, and when there was no current the electrons embedded themselves in the atoms.
5 days ago · In 1803, John Dalton revived the concept, suggesting that each element is composed of unique atoms and that chemical reactions involve the rearrangement of these atoms. In the early 20th century, discoveries accelerated. J.J. Thomson discovered the electron in 1897, revealing that atoms were divisible and contained smaller particles.
3 days ago · In 1897, the British physicist J. J. Thomson, with his colleagues John S. Townsend and H. A. Wilson, performed experiments indicating that cathode rays really were unique particles, rather than waves, atoms or molecules as was believed earlier. By 1899 he showed that their charge-to-mass ratio, e/m, was independent of cathode material. He ...
4 days ago · The quantum revolution in physics played out over a period of 22 years, from 1905 to 1927. When it was done, the new theory of quantum mechanics had completely undermined the basis for our understanding of the material world. The familiar and intuitively appealing description of an atom as a tiny solar system, with electrons orbiting the atomic ...
4 days ago · J.J. Thomson: Discovered electron, a sub-particle of an atom. Rutherford: an atom is composed of an empty space mostly with electrons orbiting in a set predictable path around a fixed positively charged nucleus(Proton+Neutron). John Dalton: First to propose Atomic Theory: Neils Bohr: Atomic structure and the concept of energy of orbits and ...
