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I have some questions to answer about it for school, and I found some of them, but there are two that I can't find in my notes or text books. Could you please help me?
-A few alpha particles were deflected. What does this evidence suggest about the structure of gold atoms?
-How should the original model be revised based on the results of this experiment?
Any help is appreciated!!

2006-09-24 06:39:00 · 4 answers · asked by um yea hi 4 in Science & Mathematics Chemistry

4 answers

OK, so ¿Why alpha particles where deflected? So an alpha particle is formed by helium nucleus, 2protons, and 2 neutrons, and has 4 atomic mass units. Protons have a positive charge.

Many of the alpha particles passed throw without any trouble showing atoms where mostly empty space.

Some of them, where deflected 0°-90°, due to same sign electrical charge. When the alpha particle closed in to a same sign charge, then the repulsion force deflected the particle.

Some other alpha particles (1 in every 10^24 particles), deflected 180°, the particle hit the gold atom nucleus and repulsing force sent it back.

2006-09-24 07:21:08 · answer #1 · answered by Ucatea T 3 · 0 0

The fact that only a few alpha particles were deflected shows that atloms are made up of mostly empty space. Though there is a nucleus in an atom and electrons spinning around the nucleus, there's a lot of empty space in between them. This is the only reason the alpha particles were able to pass through the gold foil instead of all of them being completely deflected.
Before the gold foil experiment, there were various models of the atom, all incorrect. One was J.J. Thompson's "plum-pudding" model, in which he depicted the electrons of an atom as not floating freely, but inside a thick nucleus which is positively charged. In other words, his model never allowed for the idea that atoms were composed of empty space.There was also the "cannonball" model, which, though different from the plum-pudding model, also did not allow for empty space in an atom. Rutherford's experiment proved both of these wrong by proving that atoms have a lot of empty space in them. Because of his experiment, the model of the atom should be revised to include more space in the atom between the electrons and the nucleus; and it was, to a more accurate representation, Bohr's planetary model, which depicted the electrons as rotating around the atom in fixed rings, with empty space between the electrons and the nucleus. Though somewhat inaccurate, it did take into account Rutherford's experiment, which proved that atoms are made of mostly empty space.

2006-09-24 07:01:14 · answer #2 · answered by l;wksjf;aslkd 3 · 0 0

With this experiment, Rutherford was able to interpret that atoms are not uniform. The fact that only a very small amount of alpha particles were deflected at very high angles ment that atoms were not uniform (otherwise all particles would have gone through the foil without any deviation), and that they had a quite small and dense area (the nucleus) that caused those unexpected deviations. In that way, he predicted atoms to be formed by a large almost empty region and a small dense region (the nucleus).

2006-09-24 06:49:40 · answer #3 · answered by Anonymous · 0 0

Atoms was concept to be stable products and as such alpha debris shouldn't have gone by using the gold foil as they are rather absorbed. It replaced into concept that all of us alpha debris could be absorbed or pondered back whilst rutherford executed this test it confirmed that maximum debris gone by using the gold and that atoms could be often area. The few alpha debris that bounce back are repelled back by using the nuclei of the gold atoms because of the fact the two the nuclei and the alpha debris are certainly charged,

2016-12-12 14:11:01 · answer #4 · answered by Anonymous · 0 0

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