Thomson, in full Sir Joseph John Thomson, (born December 18, 1856, Cheetham Hill, near Manchester, England—died August 30, 1940, Cambridge, Cambridgeshire), English physicist who helped revolutionize the knowledge of atomic structure by his discovery of the electron (1897).

Thomson’s

Thomson

The gold-foil experiment showed that the atom consists of a small, massive, positively charged nucleus with the negatively charged electrons being at a great distance from the centre.

Rutherford used gold for his scattering experiment because gold is the most malleable metal and he wanted the thinnest layer as possible. The goldsheet used was around 1000 atoms thick. Therefore, Rutherford selected a Gold foil in his alpha scatttering experiment.

Rutherford used gold for his scattering experiment because gold is the most malleable metal and he wanted the thinnest layer as possible; the gold sheet used was around 1000 atoms thick.

Ernest Rutherford

Protons are composite particles composed of three valence quarks: two up quarks of charge + 23e and one down quark of charge − 13e. The rest masses of quarks contribute only about 1% of a proton’s mass.

The idea of using protons in medical treatment was first suggested in 1946 by physicist Robert R. Wilson, Ph. D. The first attempts to use proton radiation to treat patients began in the 1950s in nuclear physics research facilities, but applications were limited to few areas of the body.

4 × 10−5 cm

Yes, a nucleus of aluminum is smaller than a nucleus of gold, but gold has a charge of +79, while an aluminum nucleus is only +13. The large angle scattering of alpha particles is not due to a physical collision, but rather to electrostatic repulsion.

Answer. Also, It can be answered like this: The scattering angles would have changed, but the qualitative results would also change: the reason Rutherford chose gold was because it is EXTREMELY malleable. One can stretch gold foil until it is only a few atoms thick in places, which is not possible with aluminum.

The scattering angles would have changed, but the qualitative results would also change: the reason Rutherford chose gold was because it is EXTREMELY malleable. One can stretch gold foil until it is only a few atoms thick in places, which is not possible with aluminum.

Complete step by step answer: Alpha particle scattering experiment was carried out by Rutherford in 1911 which is also known as Gold foil experiment. But if some other metal foils are used instead of gold they will have no effect on the described result until they are as thin as gold foils.

Thus, Aluminium foil cannot be used in α ray scattering experiment.

The gold foil experiment led to the conclusion that each atom in the foil was composed mostly of empty space because most alpha particles directed at the foil 1) An atom is mostly empty space with a dense, positively charged nucleus.

The vast majority of alpha particles pass straight though a piece of metal foil as if it was not there. Some alpha particles are deflected (scattered) by an angle of about 1o as they pass through the metal foil.

If the α-scattering experiment is performed using a foil of a metal rather than gold, there would be no change in the observations. In the α-scattering experiment, a gold foil was taken because gold is a malleable and a thin foil of gold can be easily made than foils of other metals.

If we use a thick foil, then more α particles would bounce back, and no idea about the location of positive mass in the atom would be available with such certainty.

Alpha Particles They are emitted from radioactive elements like Radium and Polonium. The fast moving alpha particles have considerable amount of energy. They can penetrate through the matter.

Rutherford’s model of an atom : In this experiment, fast moving alpha (α)-particles were made to fall on a thin gold foil. He selected a gold foil because he wanted as thin a layer as possible. This gold foil was about 1000 atoms thick. α-particles are doubly-charged helium ions.