What evidence shows that particles exist?

Answer 1

The British scientist James Chadwick made an experiment that had to do with a beam and being deflected by electric or magnectic fields. Since it wasn't deflected he was able to conclude that the particles carried no electric charge; therefore making them a neutron.

Answer 2

This has the base in the experiments of Ernest Rutherford and co-workers. Also the negative charge of electrons must be compensated by the positive charge of protons for the atom to be neutral.

Answer 3

Particles move around and that is called diffusion. I hope that has answered your question.

Answer 4

yor mom

Answer 5

Geiger and Marsden were doing an experiment with radioactive particles. They fired the dense, positively charged particles (alpha particles) at the thinnest piece of gold foil they could make. They expected the particles to pass straight through the gold atoms with their diffuse cloud of positive charge (as Thompson’s plum pudding model) but that did not happen and the particles bounced off the metal foil in all directions, some right back at the source.

Rutherford suggested, from the results of this experiment, that Thomson’s atomic model was not possible. The positive charge must be concentrated at a tiny spot in the centre of the atom. Otherwise the large, positive particles fired at the foil could never be repelled back towards their source. It was proposed that the electrons must be orbiting around this nucleus which contains very dense positively charge protons.

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