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How did Ernest Rutherford's atomic model compare to the plum-pudding model?

A. Rutherford's atomic model was the first to show the electrons with a negative charge within a neutral atom, as depicted in the plum-pudding model.
B. Rutherford's atomic model was the first to show that electrons with a negative charge canceled out the positively charged protons in a central nucleus.
C. Rutherford's atomic model was the first to show that neutrally charged neutrons add to the mass of the positively charged protons, as depicted in the plum-pudding model, to total the mass number.
D. Rutherford's atomic model was the first to show that the positive charges within an atom are not a uniform charge; rather they are located in a central nucleus.

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Final answer:

Ernest Rutherford's atomic model introduced the concept of a nucleus with protons and electrons orbiting around it, contrasting the plum-pudding model.


Explanation:

Rutherford's atomic model, proposed after his famous Geiger-Marsden experiment in 1909, introduced the concept of a nucleus containing positively charged protons and most of the atom's mass, with electrons orbiting around it. This model contrasted with J. J. Thomson's plum-pudding model, which described atoms as a positive mass with negative electrons embedded in it.


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