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Which of these phrases best describes an atom?(1) a positive nucleus surrounded by a hard negative shell
(2) a positive nucleus surrounded by a cloud of negative charges
(3) a hard sphere with positive particles uniformly embedded
(4) a hard sphere with negative particles uniformly embedded
"(2) a positive nucleus surrounded by a cloud of negative charges" is by far the best option, since the "cloud" formation of electrons replaced the orbital model.
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