Chemistry Timeline

  • Platinum

    Platinum
    -A use for platinum would be making jewlery.
    -The symbol for platinum is, Pt.
    -The atomic model for platinum is P:78, N:117
  • Cobalt

    Cobalt
    -Very strong magnets
    -Atomic model is P:27, N:32
    -Symbol is Co
  • Nickel

    Nickel
    -Nickel is used to make coins
    -The symbol of nickel is Ni
    -The atomic model of nickel is P:28, N:31
  • Bismuth

    Bismuth
    -Bismuth has been mined since ancient times, but it was discovered in 1753
    -Used to make fire sprinklers
    -Atomic model of bismuth is P:83, N:126
    -Symbol is Bi
  • Nitrogen

    Nitrogen
    -Used in fertilizer
    -Atomic model is P:7, N:7
    -Symbol is N
  • Oxygen

    -Oxygen is air
    -We breathe Oxygen every day
    -Atomic model is P:8, N:8
    -The symbol of oxygen is O
  • John Dalton

    John Dalton
    -Created the atomic theory
    -First to develop atomic model
    -Atomic theory states that all matter is made out of atoms and cannot neither created nor destroyed
  • Strontium

    Strontium
    -Used heavily in medical products
    -Symbol is Sr
    -Atomic model is P:38, N:50
  • Chromium

    Chromium
    -Helps use blood sugar turn into energy
    -Atomic model P:24, N:28
    -Symbol is Cr
  • Vanadium

    Vanadium
    -Used in making steel alloys
    -Symbol is V
    -Atomic model is P:23, N:28
  • Potassium

    Potassium
    -Used to make soap
    -Atomic model is P:19, N:20
    Symbol is K
  • Sodium

    Sodium
    -Used in the chemical industry
    -Needed by the nervous system in bodies
    -Atomic model is P:11, N:12
    -Symbol is Na
  • Iodine

    Iodine
    -Iodine is mostly used in nutrition
    -Atomic model is P:53, N:74
    -Symbol is I
  • Lithium

    Lithium
    -Used to make glass
    -Atomic model is P:3, N:4
    -Symbol is Li
  • Silicon

    Silicon
    -Semi conductor used in computers
    -Atomic model P:14, N:14
    -Symbol is Si
  • Aluminum

    Aluminum
    -Makes soda cans
    -Atomic model is P:13, N:14
    -Symbol is Al
  • Cesium

    Cesium
    -Cesium is used in infared detectors
    -Cesium is used in batteries that work below zero
    -Cesium is Cs
    -Atomic model of cesium is P:55, N:78
  • Indium

    Indium
    -Used on coatings for LCD's
    -Atomic model is P:49, N:66
    -Symbol is In
  • Gallium

    Gallium
    -Used to make lazers
    -Atomic model is P:31, N:39
    -Symbol is Ga
  • Argon

    Argon
    -Used in light bulbs
    -Atomic model is P:18, N:22
    -Symbol is Ar
  • J J Thomson

    J J Thomson
    -Discovered isotopes
    -Discovered the electron
    -Discovered atoms and later the mass spectroscope
  • Ernest Rutherford

    Ernest Rutherford
    -Discovered that the atom was not the smallest unit of mass
    -Discovered concept of radioactive half-life
    -Found first nuclear gas
  • Neils Bohr

    Neils Bohr
    -Neils thought that electrons travel in large orbits
    -He said that outer orbits could hold more electrons
  • Hafnium

    Hafnium
    -Used to make super hard metals
    -Atomic model P:72, N:108
    -Symbol is Hf
  • Technetium

    Technetium
    -Can be used as a medical tracer to help locate tumors and other disorders
    -Symbol is Tc
    -Atmoic model is P:43, N:55
  • Francium

    Francium
    -Used manily for science dude to its radioactive composition
    -Symbol is Fr
    -Atomic model is P:87, N:136
  • Americium

    Americium
    -Americium is used in smoke detectors
    -The symbol for Americium is Am
    -The atomic model for Americium is P:95, N: 148.
  • Schrondiger & Heisenberg

    -Both created math equation to quantum mechanics
    -Their discoveries helped us get closer to finding out what an atom is
  • Dubnium

    -Is a synthetic elemnt that is not in the environment at all
    -Has no uses
    -Symbol is Db
    -Atomic model P:105, N:157
  • Meitnerium

    Meitnerium
    -There is no use for Meiterium
    -Symbol is Mt
    -Atomic model is P:109, N:157