Science Atoms

Science Atoms
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  • MATTERS AND ATOMS!
  • Definite proportions are proportions that does not vary or change based on the way it is prepared
  • 1799: JOSEPH PROUST PROPOSED THE LAW OF DEFINITE PROPORTIONS
  • I would like to propose the atomic theory wherein matters are made up of atoms
  • 1808: John Dalton formulated the atomic theory and proposed the law of multiple proportions
  • 1869: Dmitry Mendeleev arranged the known elements in a periodic table according to their atomic mass
  •  I know that there are 63 elements existing and I will arrange them according their atomic mass
  • We should be more careful since there are some radioactivities that causes atoms to break down spontaneously
  • 1890s: Antoine Becquerel and Marie Curie observed that radioactivity causes some atoms to break down spontaneously
  • I, Wilhelm Rontgen, discovered the X-Ray.
  • 1895: Wilhelm Rontgen discovered X-Rays
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