The History of Chemical Elements

Timeline created by janmsedlacek
  • 458

    Dark ages begin

    Dark ages begin
    The dark ages in which many scientific discoveries will be made, begin.
  • Jan 1, 1000

    First Alchemists

    First Alchemists
    The first dark age Arabic Alchemists tried to turn lead into gold, therefore create new elements.
  • Jan 1, 1200

    Alchemists are wrong

    Alchemists are wrong
    Alchemists who tried to turn lead into gold were wrong. They were not able to create new elements, only new colours and pigments.
  • Jan 1, 1500

    Artist inspiration

    Artist inspiration
    Many Reannaissance artists were inspired by the new colours that the Alchemists created as a result of trying to turn lead into gold. The most famous painter who used these new colours was Giussepe Archimboldo.
  • Rennaissance and Humanism

    Rennaissance and Humanism
    The Rennaissance and Humanism ensured the creation of many new elements. Also, it was the reason for the end of dark ages in Europe.
  • Realization that Nucleae change

    Realization that Nucleae change
    Scientists realize that nucleae of atoms changes as a result of nuclear reaction
  • J.J. Thompson

    J.J. Thompson
    J.J. Thompson came up with the Atomic strucutre theory. He called it "Plum Pudding", because he thought it was just a mashup of positively charged matter and negatively charged electrons.
  • Niels Bohr

    Niels Bohr
    Niels Bohr, a Danish scientist organized the electrons into shells, now known as orbitals. Also, his atomic model is used until today.
  • Ernest Rutherford

    Ernest Rutherford
    Earnest Rutherford performed his famous experiment in which he shot Alpha particles through a thin layer of gold foil. He found out that Atom has a nucleus where most of the mass is situated and is positively charged. He also found that nearly all of the atom was empty space.
  • Japan bombing

    Japan bombing
    The bombing of Japan in 1945 using nuclear bombs has caused many reactions in the area. In fact, many post uranium elements known today were discovered on the sites of the bombings. (Hiroshima and Nagasaki)
  • Elements 94-101

    Elements 94-101
    Before the year 1955, scientists created the post- uranium elements 94-101, using only nuclear reactions.
  • The race to name Elemenets

    The race to name Elemenets
    During the Cold War, USA and Russia raced to create new elements. Then they each named them after their scientists. This resulted in many future naming misunderstandings.
  • The Cold War

    The Cold War
    In the full blow of the Cold War, which was bassically only a series of tension and threats from the World´s nuclear powers, USA and Russia, they were both racing to find new elements. In this era, many post Uranium elements such as Rentgenium, were created.
  • Germany joins the race

    Germany joins the race
    Germany uses heavy ion accelerator to create elements 107-110. It took 10 years to make their last element!
  • Elements finally named

    Elements finally named
    After years of struggle, all elements were finally named by the UIPAC (The international union of pure and applied chemisrty).These names are used until today.
  • Positive Prediction?

    Positive Prediction?
    Russian scientists predict that an atom with 114 protons and 184 neutrons would be stable. This is because many post uranium elements last for only a few seconds. They have recently created an isotope of Element 114 containing 175 neutrons and it lasted for 20 seconds!
  • Element 118

    Element 118
    Ununoctium, or the last discovered element, was discovered in 2006 by A research institute in Dubna, Russia.
  • Period:
    400
    to

    Dark Ages In Europe

    The period of Dark Ages in Europe.
  • Period: to

    The Age of Enlightment

    In this time, many new discoveries in Chemistry will be made.
  • Period: to

    The First 20 elements were discovered

    The First twenty elements were discovered. They are shown below:
    Hydrogen, helium, lithium, berrylium, boron, carbon, nitrogen, oxygen, fluorine, neon, sodium, magnesium, aluminium, silicone, phosphorus, sulphur, chlorine, argon, pottassium, calcium.
  • Period: to

    World War II

    The World War II period.
  • Period: to

    The Cold War

    The Cold War Period.