Scientists

By zela7699
  • 404 BCE

    Democritus

    Democritus
    460 bc- 370 bc
    Abdera Greece
    Contribution- He was the first to discover the atom.
    How? Broke a seashell in half.
    Facts-
    - Known as “The laughing Philosopher”, “nothing exists except and atoms and empty space, everything else is opinion.
    - Atom, first evidence-based atomic theory
    (Democritus' Model)

  • John Dalton

    John Dalton
    September 6, 1766- July 27, 1844
    UK
    Contribution- He introduced the atomic theory into chemistry
    How? He experimented with gases.
    Facts-
    - Started working as a teacher when he was 12
    - researched color-blindness
    - atomic theory
    (Dalton Atomic Theory)

  • J.J. Thompson

    J.J. Thompson
    December 18, 1856- August 30, 1940
    Britain
    Contribution- discovered the electron.
    How? Cathode Ray Tube Experiment
    Facts-
    - won a Nobel Prize
    - published over 13 books and 200 papers
    - son of bookshop owner
    (Plum Pudding Model)

  • Cathode Ray Tube Experiment

    Cathode Ray Tube Experiment

  • Robert Millikan

    Robert Millikan
    March 22, 1868- December 19, 1953
    Contribution- Discovered the value of the electron charge.
    How? Famous Oil Drop Experiment;
    Facts-
    - Graduated from Oberlin College
    - Died from a heart attack
    - won Nobel prize in physics

  • Oil Drop

    Oil Drop

  • Ernest Rutherford

    Ernest Rutherford
    August 30, 1871- October 19, 1937
    Contribution- Discovered that atoms had a nucleus.
    How? Gold Foil Experiment; shot alpha particle at a piece of gold foil.
    Facts-
    - Attended Cambridge University
    - Died from Surgical Complications
    - Won a Nobel Prize
    (Rutherford Model)

  • Rutherford's Model

    Rutherford's Model

  • Gold Foil Experiment

    Gold Foil Experiment

  • Neils Bohr

    Neils Bohr
    October 7, 1885-November 18, 1962
    Denmark
    Contributions- proposed a theory in contributing to the quantum theory
    How? Theory
    Facts-
    -Won the Nobel prize at the same time and same field and Albert einstein
    -The element bohrium is named after him.
    (Bohr Diagram)

  • Erwin Schrodinger

    Erwin Schrodinger
    August 12, 1887- January 4, 1961
    Vienna Austria
    Contribution- Used mathematical equations to find the likelihood of finding an electron in a certain position.
    How? Mathematical Equations
    Facts-
    -Father of quantum physics
    -Awarded a Nobel prize for physics
    -Moon crater named after him
    (Schrodinger model- quantum mechanical model)