Atomic Theory

By mari.rom
  • 442 BCE

    Contemplating Matter

    Democritus, a Greek rationalist, co-started the idea (with his instructor, Leucippus) that all issue is made out of unbreakable components.

  • John Dalton and Molecules

    John Dalton, a British scientist, and physicist built up a hypothesis that issue is basically made out of iotas of various loads and is consolidated in proportions by weight. Additionally suggested that these molecules are round, and are moving.

  • Cathode Ray Tube and TV

    Sir William Crookes developed a crude cathode beam tube, which later turned into the reason for TV.

  • Creation of X-rays

    Wilhelm Rontgen found that specific synthetic compounds gleamed when presented to cathode beams. These beams weren't redirected by an attractive field created in the cathode beam tube. He named these X-beams.

  • Radiation, Enery and Atoms

    Pierre and Marie Curie conjectured that radioactive particles cause molecules to separate, at that point discharging radiation that appears as vitality and subatomic particles.

  • Discovery of Electrons

    Electrons were discovered by JJ Thomson using the properties of cathode rays.

  • Creation of Early Quantum Theory

    Max Planck presented what might be known as the quantum hypothesis, expressing that electromagnetic vitality must be transmitted in quantized structure. His quanta are currently called photons by physicists.

  • The Nature of Light and Einstein

    Albert Einstein makes extraordinary and general speculations of relativity and theorizes about the molecule idea of light. This was the premise of atomic vitality.

  • Charge of an Electron Measured

    Robert Millikan estimated the charge of a solitary electron. This is known as the basic charge, one of the central physical constants.

  • Structure of an Atom Created

    Ernest Rutherford known as the dad of atomic material science built up the hypothesis for the structure of the molecule. He utilized a gold foil try, watching the dissipating of alpha particles, and showed just because of the presence of the nuclear core.

  • Bohr Improves the Atomic Model

    Neils Bohr built up the Bohr nuclear model, with electrons going in circles around the core, and synthetic properties being controlled by what number of electrons are in the external circles. He additionally incorporated the Planck quantum hypothesis, expressing that when electrons change circles they discharge a quantum of discrete vitality.

  • Math Despicts Electrons Changes

    Erwin Shrodinger depicted how electrons move in wave structure and built up the Schrodinger condition which portrays how the quantum condition of a framework changes with time.

  • Discovery of Neutrons

    James Chadwick finds the neutron segment of the nuclear core, clarifying the atomic parting of uranium 235. This likewise made it conceivable to create components heavier than uranium in the lab.

  • Nuclear Fission Created

    Otto Hahn, viewed as the dad of atomic science, finds atomic splitting, alongside Lise Meitner.

  • Atomic Medication and I-131

    Glenn Seaborg, numerous disclosures of the transuranium components, just as numerous advances in atomic medication, including the improvement of I-131 for thyroid infection.

  • Basic Particles Smaller than the Atom Murray Gell

    Mann proposes the quark model (autonomously George Zweig does also), which portrays rudimentary particles that have no base (and in this manner can't be part).