Science Atom

Science Atom

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  • Hi Gab. Our topic now in science is about atom. So, who discovered atoms?
  • So am I. He was Democritus of Abdera.
  • Now, what model represents the atom as a solid ball of matter that is indivisible with no parts?
  • That's Dalton's Billiard Ball Model. It shows that atoms of the same elements have the same masses, and atoms of different elements have different masses.
  • What model represents the atom as a positively charged mass with electrons scattered throughout it?
  • That's J.J. Thomson's "Plum Pudding" model. But, this experiment proved that there weren't that many electrons, therefore this model failed.
  • Do you know something about Rutherford's Planetary model?
  • Yeah! This model represented the atom to be much like our solar system, with the electrons orbiting the positive nucleus like planets orbit the sun.
  • You know, the Bohr's Atomic model represents the electrons orbiting the nucleus of an atom is in circular orbits?
  • These electrons had specific orbits and distinct orbital levels.
  • And now, the Electron Cloud model, is the model of the atoms that is accepted as being the most accurate one.
  • I know. Because this is similar to Bohr's model, except, the electrons aren't limited to fixed orbits.
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