The History of the Atomic Theory by Gavin Quinlivan https://padlet.com/212571/r1tpy8rk1rh4 en-us 2016-11-10 15:05:15 UTC 2025-04-24 12:22:07 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Clouds.png 400 BC - Democritus 212571 https://padlet.com/212571/r1tpy8rk1rh4/wish/136755819
  • Was the first to really think of matter and atoms
  • Given the technology of his time he could not test this.
  • Democritus had the right idea
    • ]]>     2016-11-10 15:17:24 UTC https://padlet.com/212571/r1tpy8rk1rh4/wish/136755819     Early 1800s - John Dalton 203739 https://padlet.com/212571/r1tpy8rk1rh4/wish/136757149
  • His experiments lead to acceptance of atoms.
  • His theory were widely accepted and was the foundation of modern chemistry.
    • Dalton's theory
    • All elements are made from atoms.
    • Atoms are invisible and indestructible.
    • All elements are made from different atoms but each element has its own atom.
    • Atoms from two or more elements form compounds.
    ]]>     2016-11-10 15:19:56 UTC https://padlet.com/212571/r1tpy8rk1rh4/wish/136757149     John Dalton 203739 https://padlet.com/212571/r1tpy8rk1rh4/wish/136759657 http://www.biography.com/people/john-dalton-9265201
    Hannah Lawton]]>     2016-11-10 15:24:30 UTC https://padlet.com/212571/r1tpy8rk1rh4/wish/136759657     Democritus 212571 https://padlet.com/212571/r1tpy8rk1rh4/wish/137020441 https://the-history-of-the-atom.wikispaces.com/Democritus?responseToken=2039825a5a8d1994c4476196cff5ac8d
    Gavin Quinlivan]]>     2016-11-11 15:05:45 UTC https://padlet.com/212571/r1tpy8rk1rh4/wish/137020441     1897 - JJ Thomson 212571 https://padlet.com/212571/r1tpy8rk1rh4/wish/137020774
  • JJ Thomson was the discoverer of the electron
  • First to say the atom was divisible
  • First to reason that there are also protons, but he could not find them.

    • ]]>     2016-11-11 15:06:50 UTC https://padlet.com/212571/r1tpy8rk1rh4/wish/137020774     400 BC - Aristotle 212571 https://padlet.com/212571/r1tpy8rk1rh4/wish/137024384
  • Since Aristotle was the more respected person at the time his theories were more accepted then Democritus.
  • Aristotle thought that everything was made of the 4 main elements: fire, air, earth, and water
    • ]]>     2016-11-11 15:18:31 UTC https://padlet.com/212571/r1tpy8rk1rh4/wish/137024384     Aristotle 212571 https://padlet.com/212571/r1tpy8rk1rh4/wish/137251223 https://en.wikipedia.org/wiki/Aristotle
    Gavin Quinlivan]]>     2016-11-14 01:53:10 UTC https://padlet.com/212571/r1tpy8rk1rh4/wish/137251223     JJ Thomson 212571 https://padlet.com/212571/r1tpy8rk1rh4/wish/137251301 http://www.biography.com/people/jj-thomson-40039
    Gavin Quinlivan]]>     2016-11-14 01:54:10 UTC https://padlet.com/212571/r1tpy8rk1rh4/wish/137251301     1913 - Bohr 212571 https://padlet.com/212571/r1tpy8rk1rh4/wish/137251547
  • Electrons belong to a specific energy level
  • Electrons are located on a orbit
  • Each orbit is set at a specific distance from the nucleus
    • ]]>     2016-11-14 01:57:34 UTC https://padlet.com/212571/r1tpy8rk1rh4/wish/137251547     Bhor 212571 https://padlet.com/212571/r1tpy8rk1rh4/wish/137252045 https://en.wikipedia.org/wiki/Niels_Bohr
    Gavin Quinlivan]]>     2016-11-14 02:03:34 UTC https://padlet.com/212571/r1tpy8rk1rh4/wish/137252045     Rutherford 203739 https://padlet.com/212571/r1tpy8rk1rh4/wish/137256214 http://www.glogster.com/hildaguzman/rutherford-atomic-model/g-6lv30plf6tn0rd43c4ei4a0
    Hannah Lawton ]]>     2016-11-14 02:59:04 UTC https://padlet.com/212571/r1tpy8rk1rh4/wish/137256214     1908 -Rutherford 203739 https://padlet.com/212571/r1tpy8rk1rh4/wish/137256321 After firing multiple shots of positively charged "bullets" at a thin sheet of gold foil.
    • After this experiment Rutherford discovered the nucleus after one of "bullets" repealed from the foil.
    • His theory was that all the positively charge particles in the atom were at one spot and the negative particles were scattered around it.
    An example of the gold foil model:
    ]]>     2016-11-14 03:00:33 UTC https://padlet.com/212571/r1tpy8rk1rh4/wish/137256321     Gold foil experiment 203739 https://padlet.com/212571/r1tpy8rk1rh4/wish/137257757 https://www.youtube.com/watch?v=5pZj0u_XMbc]]> 2016-11-14 03:17:38 UTC https://padlet.com/212571/r1tpy8rk1rh4/wish/137257757 The Quantum Theory of the Atom 203739 https://padlet.com/212571/r1tpy8rk1rh4/wish/137257870 After decades of experiments and theory's, scientists have have the most modern discoverment: the electron cloud. This theory stats that the electrons in an atom orbit the nucleus in a wave pattern and can never be pi-pointed to a single location.]]> 2016-11-14 03:18:55 UTC https://padlet.com/212571/r1tpy8rk1rh4/wish/137257870 The Quantum Theory of an Atom Model 203739 https://padlet.com/212571/r1tpy8rk1rh4/wish/137261334 https://dashboard.dublinschools.net/lessons/?id=8c6135921e1bf12e66e7ca5a3b5cf0cb&v=2]]> 2016-11-14 03:54:36 UTC https://padlet.com/212571/r1tpy8rk1rh4/wish/137261334