Development of the periodic table

By Gladshed man

  • discovery of phosphorus By Hennig brand

  • Robert Boyle discovers phosphorus and makes it public

  • Johann Dobreiner develops the first periodic table

  • patterns between 47 known elements are discovered

  • Dobreiner's law of triads

  • law of octaves and John newland develops the catagorisation of the 56 known elements

  • Radioactivity discovered

  • henry moseley performs x-rays on known elements and notices more patterns between them

  • Noble gases are discovered

  • J.J thompson discovers electrons

  • beta particles discovered

  • break down of atoms is caused by radioactivity

  • Protons in the atomic nucleus

  • Lanthanides and actinides

  • Neutrons and isotopes

  • 60 elements discovered

  • Electrons orbit the nucleus is discoverd