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Structure of an Atom.
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What is an Atom?. Atom is the building block of matter ..
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Development of Atomic Model Theory. Initially, scientists considered atom to be indivisible, but with Research and Development in the field, sub-atomic particles: electron (e-), proton (p+), and neutron (n) were discovered, which made atom divisible..
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Models of an Atom. THOMSON’S MODEL.
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. RUTHERFORD’S MODEL. O. Gold-foil Experiment. Result.
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. BOHR’S MODEL In 1913, Neil Bohr postulated: Only certain special orbits of electrons, are allowed inside the atom. While travelling in special orbits the electrons don’t radiate energy..
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. NEUTRONS In 1932, James Chadwick discovered another sub-atomic particle which was named as Neutron, and represented by letter ‘n’..