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state Thomson, Rutherford and Bhors model of an atom in single table?with the diagram also?

Asked by 14th March 2013, 6:32 PM
Answered by Expert
Thomson proposed that an atom was composed of a spherical ball of positive charge with "corpuscles" of negative charge imbedded in it. The corpuscles would later become known as electrons.

Rutherford discounted Thompson's solid ball model of the atom, and believed that the central positive charge of the atom represented only a small fraction of the atom's size, and that the remainder was primarily empty space. He calculated that, while an individual atom was about 1x10-10 meters in diameter, the nuclear diameter was only about 1x10-14 meters.

If the positive charge was located at the center of the atom, why were the negatively charged electrons not immediately drawn into it (opposite charges attract). Rutherford was not unaware of this problem but his model so adequately (and mathematically) explained the scattering results that it became widely accepted.

In the Bohr Model the neutrons and protons (symbolized by red and blue balls in the adjacent image) occupy a dense central region called the nucleus, and the electrons orbit the nucleus much like planets orbiting the Sun (but the orbits are not confined to a plane as is approximately true in the Solar System).

Answered by Expert 16th March 2013, 6:25 AM
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