Chemistry

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Electrical neutrality was first mentioned in .......................... 's atom

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The metal sheet used in Rutherford's experiment is lined with a layer of .....

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The Rutherford's atom has a complicated structure which resembles the ............ system, since it's composed of a central nucleus (representing the sun), and the electrons revolve around it (representing the planets).

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G.R. The electron does not fall into the nucleus despite the attraction between them ?

Bec. the centrifugal force on the moving electron is ........... in the magnitude (quantity) and opposite in direction to the attractive force between the nucleus and the electron.

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........................ scientist gave the first definiation of the element .

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Rutherford's theory had failed to explain the atomic structure. G.R.? Bec. it didn't explain the system in which .............. revolve around the nucleus.

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Cathode rays are streams of invisible rays emitted from the ................. of a discharge tube in which the pressure of the gas is very low and the potential difference between the two electrodes is about 10000 volts.

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Cathode rays are streams of invisible rays emitted from the ................. of a discharge tube in which the pressure of the gas is very low and the potential difference between the two electrodes is about 10000 volts.

Complete :

............................. ray move in straight lines.

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Cathode ray affected by both .............. and magnetic fields