Atomic History Project

By THABIS290
  • 484 BCE

    Empedocles

    Empedocles
    He postulated that matter was made up of tiny and untransformable particles called atoms, but he said that not all of them were different, as his contemporary Anaxagoras supposed, but that they were all made up of four elements: fire, water, earth and air.
  • 301 BCE

    Democritus

    Democritus
    He was the first to suggest the idea that matter was made of tiny particles. Democritus developed this idea. He called the particles atoms, which means indivisible. Democritus believed that atoms were solid structures that could not be destroyed.

  • John Dalton

    John Dalton
    He launched his atomic theory of matter. In it he said that all known elements are made up of atoms.

  • Erwin Schrödinger

    Erwin Schrödinger
    He received the Nobel Prize in Physics in 1933 for having developed Schrödinger's equation, shared with Paul Dirac.2 After maintaining a long correspondence with Albert Einstein, he proposed the mental experiment of Schrödinger's cat that showed the paradoxes and questions that led to the quantum physics.

  • J.J. Thomson

    J.J. Thomson
    Thomson maintained that the atom is a sphere of positive charge uniformly distributed with a diameter of one anstrong, in which the electrons are embedded, neutralizing the positive charge. If the electrons are displaced, they would try to return to their original position, which gives it inherent stability.

  • Ernest Rutherford

    Ernest Rutherford
    In 1911 Ernest Rutherford launched the first theory on the structure of the atom in which he said that the electrons revolved around the nucleus, as if it were a miniature solar system.

  • Niels Bohr

    Niels Bohr
    Niels Bohr, launched a new atomic theory, in it he said that the electrons revolve around the nucleus in orbits. This theory was not yet definitive, but it was the basis of current theories about the atom.

  • Louis DeBroglie

    Louis DeBroglie
    Louis De Broglie's hypothesis arises from the idea that had been installed at that time regarding the dual nature of electromagnetic radiation. He proposed that under certain experimental conditions, light could behave like a particle and also have wave characteristics.

  • James Chadwick

    James Chadwick
    James Chadwick discovered the neutron, one of the fundamental particles of matter found in the nucleus of the atom.