Periodic Table

By Darvin
  • The Proficience and Advancement of Learning

    The Proficience and Advancement of Learning
    Sir Francis Bacon published "The Proficience and Advancement of Learning" which included a description of what would later be known as the scientific method.
  • The Sceptical Chymist

    The Sceptical Chymist
    Robert Boyle published "The Sceptical Chymist". It contained some of the earliest ideas of atoms, molecules, and chemical reaction.
  • Phosphorus Disovered

    Phosphorus Disovered
    A german alchemeist named Hennig Brand discovered the element Phosphorus
  • Helium Isoloated

    Helium Isoloated
    Helium was isolated by Sir William Ramsay and independently by N. A. Langley and P. T. Cleve in London.
  • Isolation of CO2

    Joseph Black, a chemist, isolated Carbon Dioxide who then called it "fixed air".
  • Magnesium Discovered

    Magnesium Discovered
    Magnesium was discovered by Joseph Black, in England
  • Hydrogen Discovered

    Hydrogen Discovered
    Hydrogen was discovered by English chemist and physicist Henry Cavendish.
  • Hydrogen being colourless

    Hydrogen being colourless
    Henry Cavendish discovered hydrogen as a colorless, odourless gas that burns and can form an explosive mixture with air
  • Nitrogen Discovered

    Nitrogen Discovered
    Nitrogen was discovered by Scottish chemist Daniel Rutherford.
  • Period: to

    Isolation of Oxygen

    Carl Wilhelm Scheele and Joseph Priestly independently isolated oxygen
  • Chlorine Discovered

    Chlorine Discovered
    Chlorine was discovered by a Swedish scientist, Carl Willam Scheele.
  • First List of Elements

    First List of Elements
    Antoine Lavoisier wrote the first extensive list of elements containing 33 elements & distinguished between metals and non-metals
  • Berylium Discovered

    Berylium Discovered
    Beryllium was discovered by French chemist Louis-Nicolas Vauquelin.
  • Daltons Law

    Daltons Law
    John Dalton proposed "Dalton's Law" describing the relationship between the components in a mixture of gases.
  • Sodium Discovered

    Sodium Discovered
    Sodium was discovered by English chemist Sir Humphry Davy.
  • Boron Discovered

    Boron Discovered
    Boron was first discovered by Sir Humphrey Davy, Joseph-Louis Gay-Lussac and Louis Jacques Thênard.
  • Magnesium Isolated

    Magnesium was isolated by A. A. B. Bussy and Sir Humphrey Davy.
  • Elements Discovered

    47 elements were discovered, and scientists began to see patterns in the characteristics.
  • Lithium Discovered

    Lithium Discovered
    Lithium was discovered by Swedish chemist known as Johan August Arfwedson.
  • Aluminium Discovered

    Aluminium Discovered
    Aluminium was discovered by Danish chemist and physicist Hans Christian Oersted.
  • Introduction of Letters and Symbols

    Jakob Berzelius developed a table of atomic weights & introduced letters to symbolize elements
  • Grouping of Elements

    English chemist John Newlands divided the discovered 56 elements into 11 groups based on simlarities.
  • Periodic Table in Atomic Weights

    Periodic Table in Atomic Weights
    Dmitri Mendeleev produced a table based on atomic weights but arranged 'periodically' with elements with similar properties under each other. His Periodic Table included the 66 known elements organized by atomic weights.
  • Helium Discovered

    Helium Discovered
    In 1868 a French astronomer, Pierre Janssen in 1868 found proof of helium in the Sun.
  • Fluorine Discovered

    Fluorine was discovered by French chemist Henri Moissan.
  • Noble Gasses Discovered

    William Ramsay discovered the Noble Gasses
  • Electrons Negative Charge

    English physicist discovered that electrons had a small nageative charge in an atom. Later on John Townsend and Robert Millikan determined their exact charge and mass.
  • Neon Discovered

    Neon Discovered
    Neon was discovered by Sir William Ramsay, a Scottish chemist, and Morris M. Travers, an English chemist.
  • Radioactivity Discovered

    Radioactivity Discovered
    Ernest Rutherford discovered the source of radioactivity as decaying atoms
  • Orbiting Electrons

    Rutherford and German physicist Hans Geiger discovered that electrons orbit the nucleus of an atom.
  • Movement of Electrons

    Niels Bohr discovered that electrons move around a nucleus in discrete energy called orbitals.
  • Protons in the Nucleus

    Protons in the Nucleus
    Ernest Rutherford first discovered that the nucleus of an atom contained protons.
  • Neutrons and Isotopes

    James Chadwick first discovered neutrons isotopes.
  • Lanthanides and Actinide

    Glenn Seaborg identified lanthanides and actinide