TylerH1

By Tylerdhunttttt
  • 460 BCE

    Democritus

    Democritus was an Ancient Greek pre-Socratic philosopher from Abdera primarily remembered today for his formulation of an atomic theory of the universe. None of his work has survived
  • 428 BCE

    Plato

    Plato was a Greek philosopher born in Athens during the Classical period in Ancient Greece. He founded the Platonist school of thought and the Academy the first institution of higher learning on the European continent.
  • 384 BCE

    Aristotle

    Aristotle was a Greek philosopher and polymath during the Classical period in Ancient Greece. Taught by Plato, he was the founder of the Peripatetic school of philosophy within the Lyceum and the wider Aristotelian tradition.

  • lavoisier

    Antoine Lavoisier was a French nobleman and chemist who was central to the 18th-century chemical revolution and who had a large influence on both the history of chemistry and the history of biology. He was mostly known for his discovery of the role oxygen plays in combustion. He recognized and named oxygen (1778) and hydrogen (1783)

  • John Dalton

    John Dalton FRS was an English chemist, physicist and meteorologist. He is best known for introducing the atomic theory into chemistry, and for his research into colour blindness, which he had. Colour blindness is known as Daltonism in several languages, being named after him.

  • The Alchemists

    The alchemists believed that all metals were formed from two principles , mercury, and sulfur. The mercury, with its essential property of fluidity and fusibility, gave rise to the malleability of metals. The sulphur, with its essential property of combustibility, contributed body and calcination (rusting).

  • Newtons Law of Octaves

    Newland's Law of Octaves is when Elements are put in increasing order of Atomic Mass. The properties of every eighth Element starting from any Element are a repetition of the properties of the starting Element.

  • Robert Millikan

    Robert Andrews Millikan was an American experimental physicist honored with the Nobel Prize for Physics in 1923 for the measurement of the elementary electric charge and for his work on the photoelectric effect.

  • Mendeleev's Periodic Table

    Mendeleev claimed the famous periodic law that “Element properties are a periodic function of their atomic weight.” Mendeleev placed elements in the order of their atomic weights in the form of a table known as the Periodic Table of Mendeleev.

  • Photoelectric Effect

    photoelectric effect is a phenomenon in which electrically charged particles are released from or within a material when it absorbs electromagnetic radiation.

  • Discovery of Radioactivity

    At the University of Wurzburg, Roentgen found that fluorescence, which penetrated opaque black paper, was caused by rays. This was later coined "x-rays" which led to radioactive discovery.

  • Discovery of the Electron

    During the 1880s and '90s scientists searched cathode rays for the carrier of the electrical properties in matter. Their work culminated in the discovery by English physicist J.J. Thomson of the electron.

  • Planck's Quantum Theory of Light

    Planck's quantum theory of light tells us that light bulb filaments should be heated to a temperature of about 3,200 K to ensure that most of the energy is emitted as visible waves. Much hotter, and we'd start tanning from the ultraviolet light.

  • Plum Pudding Model

    The plum pudding model is a historical scientific model of the atom. The plum pudding model is defined by electrons surrounded by a volume of positive charge like negatively-charged “plums” embedded in a positively-charged “pudding” (hence the name).

  • Rutherford's Gold Foil Experiment

    A piece of gold foil was hit with alpha particles which have a positive charge. Most alpha particles went right through. This showed that the gold atoms were mostly empty space.

  • Charge of the Electron

    The elementary charge, usually denoted by e is the electric charge carried by a single proton or, equivalently, the magnitude of the negative electric charge carried by a single electron, which has charge −1 e.

  • Bohr's Planetary Model

    According to the Bohr model often referred to as a planetary model the electrons circle the nucleus of the atom in specific paths called orbits. When the electron is in one of these orbits its energy is fixed.

  • Mosley's Atomic Numbers

    Moseley published a paper in which he concluded that the atomic number is the number of positive charges in the atomic nucleus. He also stated that there were three unknown elements, with atomic numbers 43, 61, and 75, between aluminum and gold.

  • Discovery of the Proton

    The proton was discovered by Ernest Rutherford in the early 1900's. During this period his research resulted in a nuclear reaction which led to the first 'splitting' of the atom. This is where he discovered protons.

  • Shrodinger Equation

    The Schrodinger equation is a linear partial differential equation that governs the wave function of a quantum-mechanical system. It is a key result in quantum mechanics, and its discovery was a significant landmark in the development of the subject.

  • Heisenberg Uncertainty Principle

    Formulated by the German physicist and Nobel laureate Werner Heisenberg in 1927 the uncertainty principle states that we cannot know both the position and speed of a particle, such as a photon or electron, with perfect accuracy. The more we nail down the particle's position, the less we know about its speed.

  • Discovery of the Neutron

    German nuclear physicists Herbert Becker and Walther Bothe observed that a penetrating form of radiation was produced when the alpha particles emitted by polonium was incident on relatively light elements such as lithium, beryllium, and boron. This penetrating radiation was unaffected by electric fields and was, therefore, assumed to be gamma radiation.