dipity

Created by woodchurchscience on 11/01/2009

Last updated: 06/11/09 at 04:43

• darmstadtium
  16/08/2003

  element 110 officially named. first created by fusion 9.11.1994

• seaborg
  1943

  made new elements he called 'actinides'

• mosely
  1914

  henry mosely discovered atomic numbers using x ray wavelengths

• ramsay
  1894

  william ramsay discovered noble gases

• mendeleev
  1869

  produced table arranged periodically but with gaps

• newlands
  1865

  observed repeating patterns he called law of octaves

• odling
  1864

  developed table with better features than mendeleev

• meyer
  1864

  produced table same time as mendeleev but published too late

• beguyer de chancourtois
  1862

  discovered elements had periodicity

• cannizzaro
  1858

  established values for atomic weights

• berzelius
  1828

  introduced chemical symbols

• dobereiner
  1817

  arranged elements into triads

• lavoisier
  1789

  wrote first list of elements and metals and non-metals