Periodic Table

• He grouped the elements in 3 sections

  Johan Wolfgang Dobereiner
• Know for helican graph

  Alexander Beguyer de Chancourtois
• Arranged elements in atomic mass

  Dimitri Mendeleev
• law of octavs

  John newlands
• 56 elements in the periodic table

  julius Lothar meyer
• Proposed an additional series of transuranium

  Glenn Seaborg
• Group or families is the vertical column of elements
• Periods are the horizontal row of elements
• arranged elements in atomic number

  henry moseley