The History Of Matter

Timeline created by olivia.verge
  • -450 BCE

    Four Elements

    Scientist: Empedocles
    Theory/Discovery: Everything is made up of the four elements; earth, air, water, fire
    Details: The elements were thought to each share characteristics; dry, wet, hot and cold. Empedocles check this theory and determined that since air takes up space, it is a form of matter
  • -400 BCE

    The Atom

    Scientist: Democritus
    Theory/Discovery: All matter can be continually divided until a singe particle is reached. The particle was named "the atom" as atom means "cannot be cut"
    Details: Democritus then proposed that atoms are
    -of different sizes
    -in constant motion
    -separated by empty spaces
  • -350 BCE

    Belief of the Four Elements

    Scientist: Aristotle
    Theory/Discovery: The four elements
    Details: Atristole believed in Empedocles's four elements theory and because of his influence and writings, lead the world to believe as well for almost 2000 years.
  • Elements

    Scientist: Robert Boyle
    Theory/Discovery: Elements are simple unmitigated bodies
    Details: Robert Boyle rejected the four-element theory and came up with his own theory, known as the modern definition of elements. Boyle also believed that air was a mixture and not an element
  • Oxygen as an Element

    Scientist: Joseph Priestley & Antoine Lavoisier
    Theory/Discovery: Oxygen is a mixture
    Details: Joseph Priestley isolated oxygen but then Antoine Lavoisier realized that it was an element. He then experimented to find that air was a mixture of oxygen and at least one other gas
  • Hydrogen

    Scientist: Henry Cavendish
    Theory/Discovery: Hydrogen and that water is a mixture
    Details: Henry Cavendish mixed metal with acid and created hydrogen. He discovered that hydrogen would burn in oxygen and produce water
  • Billiard Ball Model (Atomic Model)

    Scientist: John Dalton
    Theory/Discovery: Billard ball model
    Details: John Dalton's atomic model stated that
    -All matter is made of atoms which are particles too small to see
    -Each element has its own kind of atom with its own mass
    -Compounds are created when atoms of different elements link to form molecules
    -Atoms can not be created nor destroyed or subdivided in chemical changes
  • Ions

    Scientist:
    Theory/Discovery:
    Details:
  • Electron

  • Nucleus and Proton

  • Proton

  • Neutron

  • Period:
    500
    to

    Continuation of the Belief of the Four Elements

    Scientist: Alchemists
    Theory: Metals ripen into gold
    Details: The alchemists tried to grow gold from cheaper metals but had no success. Though failing to grow gold the alchemists came up with the chemical symbols for elements and compounds, and many common lab tools still used today.