Scientist timeline

Timeline created by amandalewis14
  • 400

    Democritus

    Found the atom all atoms are indivisible atom deride from atoms atomos is Greek for indivisible.
  • 500

    "Alchemist"

    A Person involved with alchemy which is the beginning type of science where modern chemistry was believed to come from.
  • Coulomb

    Sensitive Apparatus to measure the electrical forces involved in Priestley's law.
  • Antoine Lavoisier

    He became the father of modern chemistry. He invented the system of chemical nomenclatur,e still largely in use today.
  • John Dalton

    He proposed the atomic theory with spherical solid masses in motion. atoms can't be made or destroyed.
  • Michael Faraday

    Studdied the effect of electricity on solutions developed laws of electrolysis.
  • Dmitri Mendeleev

    Arranged elements into 7 groupswith similar properties. He discovered that the properties of elements "were periodic function of their atomic weights." This became known as the periodic law.
  • Sir William Crookes

    Constructed a primitive cathode ray tube, which later became basis for tv.
  • Wilhelm Roentgen

    Chielfly associated with his discoveries of x-rays. The first x-ray picture he made of his wifes hand is called "Rontgenogram."
  • Henri Becquerel

    Studdied the effects of x-rays on photographic philm. He discovered some chemicals spontaneously decompose and give off penetrating rays.
  • J.J. Thomson

    He described atoms as a ball as positive charge containing a number of electrons, discovered the electrons.
  • Madame Curie

    Radio active particles cause atoms to break down, releasing radiation that takes the form of energy and subatomic particles. Coined the term radioactivity.
  • Max Planck

    He developed the Quantum theory.
  • Albert Einstein

    Creates special and general theorys of relativity, and hypothesizes about the nature of light. This was basis of nuclear energy.
  • Robert Andrews Milikan

    worked on an oil drop experiment which was used to measure the charge on an electron. We are able to measure the charge of a single electron because of his experiment.
  • Niels Bohr

    Neobel prize in 1922- designed the Bohr planetary model- picture of atomic structure. Proposesd that the atom is "succesive orbital shells of electrons."
  • H.G.J. Moesley

    discovered that the number of protons in an element determines its atomic number
  • Louis deBroglie

    Discovered that electrons had a dual nature similar to both particles and waves.
  • Werener Heisenberg

    Quantum mechanical model where electrons are in probability zones called orbitas.
  • Ernest Rutherford

    He is the father of nuclear physics. He determined that the nucleus of an atom is very dense and has a positive charge.
  • Schroedinger

    He proposed the "Electron cloud theory." He identified the electron cloud as the propable location of mobing particle.
  • James Chadwick

    He proved the existance of newtron. He discovered a particle within the nucleus that has a mass similar to that of a proton.
  • Otto Hahn

    thought of as the father of nuclear chemistry, discovers nuclear fission.
  • Lisa Meitner

    discovered nuclear fission with Otto Hahn
  • Glenn Seaborg

    Descovered 8 transuranium elements.
  • Enrico Fermi

    He conducted the first chain reaction releasing energy from the atoms nucleus.
  • Gell-Mann

    proposes the quark model which describes elementary particles that have no substurctue.
  • George Zweig

    Won the Nobel peace prize for the discoveries concerning the classification of elementary particles and their interactions. He is still alive today.