It took many years of research to find out what elements make up our known universe and surroundings. Some elements behave 60chemicallychloriDimitri MendeleevineJohann DobereinerJohn Newlandslithiummassoctavesodiumorganisingpatternspotassirominsevensimilarthreetriads in 60chemicallychloriDimitri MendeleevineJohann DobereinerJohn Newlandslithiummassoctavesodiumorganisingpatternspotassirominsevensimilarthreetriads ways. These were grouped together and 60chemicallychloriDimitri MendeleevineJohann DobereinerJohn Newlandslithiummassoctavesodiumorganisingpatternspotassirominsevensimilarthreetriads within these groups studied.

By the mid nineteenth century about 60chemicallychloriDimitri MendeleevineJohann DobereinerJohn Newlandslithiummassoctavesodiumorganisingpatternspotassirominsevensimilarthreetriads elements were known. 60chemicallychloriDimitri MendeleevineJohann DobereinerJohn Newlandslithiummassoctavesodiumorganisingpatternspotassirominsevensimilarthreetriads looked for elements with similar properties in groups of 60chemicallychloriDimitri MendeleevineJohann DobereinerJohn Newlandslithiummassoctavesodiumorganisingpatternspotassirominsevensimilarthreetriads. Or also called 60chemicallychloriDimitri MendeleevineJohann DobereinerJohn Newlandslithiummassoctavesodiumorganisingpatternspotassirominsevensimilarthreetriads. For instance 60chemicallychloriDimitri MendeleevineJohann DobereinerJohn Newlandslithiummassoctavesodiumorganisingpatternspotassirominsevensimilarthreetriads, s60chemicallychloriDimitri MendeleevineJohann DobereinerJohn Newlandslithiummassoctavesodiumorganisingpatternspotassirominsevensimilarthreetriads and 60chemicallychloriDimitri MendeleevineJohann DobereinerJohn Newlandslithiummassoctavesodiumorganisingpatternspotassirominsevensimilarthreetriadsum were grouped together. Also 60chemicallychloriDimitri MendeleevineJohann DobereinerJohn Newlandslithiummassoctavesodiumorganisingpatternspotassirominsevensimilarthreetriadsne, b60chemicallychloriDimitri MendeleevineJohann DobereinerJohn Newlandslithiummassoctavesodiumorganisingpatternspotassirominsevensimilarthreetriadse and iod60chemicallychloriDimitri MendeleevineJohann DobereinerJohn Newlandslithiummassoctavesodiumorganisingpatternspotassirominsevensimilarthreetriads too.

60chemicallychloriDimitri MendeleevineJohann DobereinerJohn Newlandslithiummassoctavesodiumorganisingpatternspotassirominsevensimilarthreetriads thought he discovered groups of 60chemicallychloriDimitri MendeleevineJohann DobereinerJohn Newlandslithiummassoctavesodiumorganisingpatternspotassirominsevensimilarthreetriads elements. This he called the 60chemicallychloriDimitri MendeleevineJohann DobereinerJohn Newlandslithiummassoctavesodiumorganisingpatternspotassirominsevensimilarthreetriads.

It was until 60chemicallychloriDimitri MendeleevineJohann DobereinerJohn Newlandslithiummassoctavesodiumorganisingpatternspotassirominsevensimilarthreetriads a card player who used the 60chemicallychloriDimitri MendeleevineJohann DobereinerJohn Newlandslithiummassoctavesodiumorganisingpatternspotassirominsevensimilarthreetriads of an element to arrange them in order. He started from the lightest to the heaviest. His approach of arranging elements is now accepted as the best way of 60chemicallychloriDimitri MendeleevineJohann DobereinerJohn Newlandslithiummassoctavesodiumorganisingpatternspotassirominsevensimilarthreetriads the elements.