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Montāžas Teksta

  • Democritus was a central figure in the development of the atomic theory of the universe. He theorized that all material bodies are made up of indivisibly small “atoms.”
  • John Dalton proposed that atoms are small and indivisible, can't be divided created or destroyed, an element = identical, different elements = different properties, atoms of different elements combine to form compounds
  • Joseph John Thomson found out that an atom consists of negative and positve charges and that an atom is eletrically neutral. He also made the Plum-pudding model.
  • Ernest Rutherford theorized that atoms are mainly empty pace, positive charge is concentrate at the center of atom, the nucleus, the center of the atom = nucleus, and that electrons move around the nucleus, he also made the Nuclear model.
  • Niels bohr said that electrons orbit the nucleus, that the orbits have specific size and energy, that the energy is related to its size, that the lowest energy is found in the smallest orbit
  • Erwin Shrodinger discovered that electrons move around the nucleus in a cloud not orbits. Orbital helps us predict the area where we can find the electrons. The closer position to the nucleus, the higher chance to find electrons.
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