I think it would be Neutrons. (:
positive
That the mass of an atom is mostly located in a small nucleus.
The conclusion was that an atom has a nucleus (center) with a positive charge.
In the experiment, Rutherford found the nucleus using gold foil.because he used a thin sheet of gold foil.Because he used a gold foil (the only metal that can be hammered into a 1 atom thick foil without tearing) in an attempt to scatter alpha particles.The unexpected result that instead of all of the alpha particles scattering through small forward angles, a few bounced almost directly back to the source. This made the Thompson "plum pudding" model of the atom unworkable and suggested that each atom had a tiny "infinitely hard" kernel somewhere inside it. Rutherford named this kernel the nucleus.
th gold foil experiment
positive
yes it was tested by the gold foil experiment
Rutherfords experiment proved the existence of a nucleus as some alpha particles "bounced back" from the gold foil sample . Thomson model did not involve a nucleus and predicted just a slight deflection or none at all.
In Rutherford's gold foil experiment, some of the Alpha particles aimed at gold atoms bounced back, suggesting that a solid mass was at the center of the atom.They suggested that most of the mass of the atom is concentrated at the center and the center is positively charged.
he shot tiny alpha particles throug a piece of gold foil.
His experiment with the gold foil and the beam of positively charged particles proved that the nucleus of the atom is not solid. The beam past through the foil and bounced back. Rutherford's experiment contradicted Thomson's theory that an atom is solid.
That the mass of an atom is mostly located in a small nucleus.
Everyone thought that the alpha particles would go through the gold- foil with little deflection. When the alpha particle passed straight through the gold atoms with no deflection or bounced straight back a small fraction bounced off at a large angle, or bounced straight back to the source. Rutherford came up with a new theory of the atom, that the atom is mostly empty space and in the center there is a nucleus. this is known as the nucleus atom.
The conclusion was that an atom has a nucleus (center) with a positive charge.
For Rutherford's gold foil experiment, you will need the following materials: thin gold foil, alpha particles, a source for the alpha particles, a fluorescent screen or detector to observe the scattered particles, and a vacuum chamber to prevent air molecules from interfering with the experiment.
no i belive he did the gold foil experiment which proved the existence of the nucleus, he fired protons at an atom and 1 in every 30,000 bounced back.
to find out if all element has the same mass or can pass through the tin foil in other words not all passed through