Periodic table

Yr 9 Chemistry Assessment Task

By taz harding145
  • The start of the development of the Periodic table

    The start of the development of the Periodic table

    Dmitri Mendeleev ( a Russain chemist) started the development of the periodic table by arranging elements by atomic mass
  • The discovery of the noble gases

    The discovery of the noble gases

    Sir William Ramsay & Lord Rayleigh discovered the noble gases, which were added to the periodic table as group 0
  • The discovery of electrons

    The discovery of electrons

    J.J Thomson discovers the electrons which are used to used to find out how reactive a element is
  • The discovery of orbit

    The discovery of orbit

    Ernest Rutherford and Hans Grieger discover that electrons orbit the nucleus of an atoms in elements.
  • The discovery of protons

    The discovery of protons

    Ernest Rutherford discovers protons in the atomic nucleus.
  • Atomic numbers

    Atomic numbers

    Henry Moseley creates atomic numbers, which are based on the number of eletrons in an atom.
  • The complete basis of the periodic table

    The complete basis of the periodic table

    James Chadwick dicovers neutrons in the nucleus and isotopes are discovered. This completed the basis of the periodic table.
  • Lanthanides ans actinides

    Lanthanides ans actinides

    Glenn Seaborg identifies lanthanides and actinides. Which are usually seen under the periodic table.