Chemistry

Timeline created by Vexx360
  • Albert Einstein

    Albert Einstein
    Albert Einstein born 14 March 1879 Died 18 April 1955 was a German-born theoretical physicist who developed the general theory of relativity, one of the two pillars of modern physics (alongside quantum mechanics).[2][3] While best known for his mass–energy equivalence formula E = mc2 which has been dubbed "the world's most famous equation", he received the 1921 Nobel Prize in Physics "for his services to theoretical physics, and especiall
  • Cathode Ray Tube

    Cathode Ray Tube
    The cathode ray tube (CRT) is a vacuum tube containing one or more electron guns (a source of electrons or electron emitter) and a fluorescent screen used to view images.It has a means to accelerate and deflect the electron beam(s) onto the screen to create the images.CRTs have also been used as memory devices, in which case the visible light emitted from the fluor.The earliest version of the CRT was invented by the German physicist Ferdinand Braun in 1897 and is also known as the Braun tube.
  • Marie and Pierre Currie

    Marie and Pierre Currie
    Marie and Pierre Curie were a European couple that contributed to atomic chemistry by exploring the mysteries of radioactivity. After radiation was discovered by Henri Baquerel, Marie decided to look further into this discovery. Through this she and her husband discovered the elements radium and polonium and won the Nobel Peace Prize for their works in radioactivity. Her discovery later added to the atomic model.
  • Max Planck

    Max Planck
    Max Planck was a German scientist that created the Quantum Theory. In this theory, Planck stated that energy was given off in little packets of energy. These were called photons when talking about light. He discovered that the energy in wave form is restricted to specific quantaties. This discovery led to the understanding of energy levels in atoms, since quantums are leaps in the atom. This discovery later added to the advance in the atomic model.
  • Plum pudding

    The plum pudding model of the atom by J. J. Thomson, who discovered the electron in 1897, was proposed in 1904 before the discovery of the atomic nucleus in order to add the electron to the atomic model.
  • Gold-Foil Experiment

    Hans Geiger and Ernest Marsden,
    Top: Expected results: alpha particles passing through the plum pudding model of the atom undisturbed.
    Bottom: Observed results: a small portion of the particles were deflected, indicating a small, concentrated positive charge.
  • Nuclear Model

    Discovered by Ernest Rutherford, his gold foil experiment proved the existence of the nucleus of an atom.
  • Bohr Model

    the Bohr model, introduced by Niels Bohr in 1913, depicts the atom as small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus—similar in structure to the solar system, but with attraction provided by electrostatic forces rather than gravity.
  • Erwin Schrodinger

    Erwin Schrodinger
    Erwin Scrhodinger was an Austrian scientist that worked with the Quantum model of the atom. He disagreed with Bohr's theory, so he created his own. He thought that the only way to find the location and energy of an electron in an atom was to calculate its probability of being a certain distance from the nucleus. This equation influenced the Quantum mechanical model of the atom.
  • Uncertainty principle

    Created by Werner Heisenberg, The uncertainty principle is any of a variety of mathematical inequalities asserting a fundamental limit to the precision with which certain pairs of physical properties of a particle known as complementary variables, such as position x and momentum p, can be known simultaneously.