historical+development+of+the+model+of+atomic+theory


 * //Historical development of the model of atomic theory// **


 * Videos**

John Dalton's atomic theory || media type="custom" key="23044184" How J. J. Thomson came up with his 'plum pudding' model of the atom || media type="custom" key="23044340" Rutherford's discovery ||
 * media type="custom" key="23044118"

James Chadwick's discovery of the neutron || media type="custom" key="23056724" Niels Bohr's atomic model ||
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> circle or ellipse, similar to the motion of planets around a sun. >
 * Common Misconceptions:**
 * "The planetary model" (see below) is used to represent the orbits of electrons around a nucleus, some people think that electrons travel at a constant rate along a 2-dimensional
 * An atom resembles a sphere with components inside.
 * An atom is a 'solid' structure.
 * Matter exists between atoms.
 * Atoms are flat.

> to each other. >
 * Interesting Facts:**
 * Electrons don't move in a definite path.
 * It is impossible to find the exact location of an electron.
 * Each proton has a positive electrical charge. The charge of a proton and an electron are equal in magnitude, yet opposite in sign. Electrons and protons are electrically attracted


 * Resources:**
 * History of atomic theory lesson plan from Learn NC.
 * Atomic Theory Jeopardy from CNA.
 * Build an Atom simulation from PhET
 * Historical summary of atomic theory.