CBSE Class 9 Answered
2)How did Rutherford prove that positive charged particles are present in the nuclease of an atom
Asked by rohan | 06 Dec, 2013, 04:37: PM
Expert Answer
Rutherford in 1911, introduced the concept of a nucleus being present in the atom. Hence it is known as the nuclear atomic model.
He conducted an experiment in which positively charged particles (called alpha particle) were shot at a very thin piece of gold foil in vacuum.
One of the observations was that, some particles were deflected through small and large angles.
As particles deflected through small angles, it indicates that there is a centre of positive charge in an atom. This center repels the positively charged alpha particles and deflects them from their original path.
It concludes that there are positively charged particles in the nucleus of an atom.
Answered by Prachi Sawant | 09 Dec, 2013, 10:32: AM
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