This is a grammar forum, not a physics forum, but from the text you have supplied, I suppose it means that Niels Bohr located the electrons in their orbits around the nucleus, while Ernest Rutherford did not indicate where they were or what they were doing. J. Thomson that held to the 'plum pudding' model, while his student Rutherford, like Niels Bohr, posited electrons orbiting a central nucleus.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
AvangiTo be in orbit is to travel in a more or less circular path.More "less" than "more" once you get past the first electron shell. Those orbits loop around in the most twisting ways you can imagine. (I thoroughly disapprove, of course.)
enkiduI did not understand what difference are there between these two scientist's theroies.That's not surprising. It's very poorly explained. Rutherford said the electrons orbited in a dense cloud around the nucleus. The implication is that the distance from the center didn't make any difference -- just any size orbit would do. Bohr said that the orbits c