science assignment

  • 330


    The four element theory was proposed by Aristotle: Earth, Air, Fire and water.
  • 440

    democritus and Leucippus

    The idea of the atom where by the democritus and leucippus which is a indivisible particle that all matter is made of.
  • Henry Cavendish

    Hydrogen was discovered as a colorless, odourless gas by Henry Cavendish.
  • Antoine Lavoisier

    The first extensive list of elements was made by Antoine Lavoisier with 33 elements which was made up with metals and non-metals
  • Lothar Meyer

    An early version of a periodic table which was made up with 28 element by Lothar Meyer.
  • Dmitri Mendeleev

    Dmitri Mendeleev produced a table with 66 known element in it. It was organized by atomic weight.
  • William Ramsay

    Noble gases was discovered by William Ramsay.
  • Henry Moseley

    The atomic number of every element was made by Henry Moseley.