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Which of the following were conclusions based on Rutherford's gold foil experiment? Choose ALL that apply.
A) atoms contain a nucleus
B) Electrons have a mass much greater than that of protons
C) the mass and positive charge of an atom is concentrated in a small space in the center of the atom
D) most of the atom is empty space

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Answer:The alpha particles that were fired at the gold foil were positively charged. ... These experiments led Rutherford to describe the atom as containing mostly empty space, with a very small, dense, positively charged nucleus at the center, which contained most of the mass of the atom, with the electrons orbiting the nucleus.

Explanation:Thomson's cathode ray experiment and Rutherford's gold foil experiment. ... that the atom is mostly empty space with a tiny, dense, positively-charged nucleus. ... mass of each particle was much, much smaller than that of any known atom. ... Why did Thomson conclude that electrons could be found in atoms of all elements?

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