If the positive alpha particles mostly passed through the foil, but some bounced back. Protons & neutrons are collectively called nucleons. According to this model : (i) An atom consists of a heavy positively charged nucleus where all protons and neutrons are present. One of the most important contributions to atomic theory (the field of science that looks at atoms) was the development of quantum theory. On the basis of scattering experiment, Rutherford proposed a model of the atom which is known as nuclear atomic model. This model proposed that electrons revolve in stable orbits around the nucleus, but can jump from one energy level (orbit) to another. Other models of the atom (ESAAT) Although the most commonly used model of the atom is the Bohr model, scientists are still developing new and improved theories on what the atom looks like. How could that be if the plumb pudding model was correct? Rutherford's experiment prompted a change in the atomic model. This model was proposed by Rutherford, and it argued that the nucleus was a tiny dense core that was in the center of the atom and the electrons are distributed in the space around it.
According to this model, the atom consists of a massive positive center surrounded by many orbiting electrons in the manner of Saturn and its rings. Rutherford found that most of them went right through the foil. His model was known as the Saturnian model of the atom. If you shoot these positive alpha particles at this positive pudding atom, they should mostly bounce off, right? Well, that is not what happened. According to Rutherford, negatively charged electrons. This nucleus is very small in size, as compared to the size of the atom as a whole. He referred to this portion of the atom as the nucleus. In the nuclear model: the mass of an atom is concentrated at its. He shot some alpha particles (which are really just the nucleus of a helium atom) at some really thin gold foil. The Rutherford atomic model states: Positively charged particles and the majority of an atom’s mass were concentrated in an incredibly tiny volume. This evidence led Rutherford to suggest a new model for the atom, called the nuclear model.
Ernest Rutherford said one day "hey, I think I will shoot some stuff at atoms." I am sure his wife said "oh, Ernie" (she probably called him Ernie) "if it makes you happy to play with your little physics stuff, go ahead.