Centrifugal forces are balanced in atom by__________________?
Correct answer: A. Attractive forces
- A. Attractive forces
- B. Repulsive force
- C. Electrons
- D. Neutrons
Explanation
In the classical model of an atom, the outward centrifugal effect associated with an electron’s circular motion is balanced by the inward electrostatic attraction between the negatively charged electron and the positively charged nucleus. Repulsive force would act in the opposite direction and would not provide this balance. Students may choose electrons because electrons are moving, but the balancing force is the attraction between charges.
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About Discovery of the Proton
The discovery of the proton follows the study of positive rays, also called canal rays, observed in discharge tubes and later identified as positively charged particles. The work of Goldstein and Rutherford is linked to the proton's charge, relative mass and role in the nuclear model, distinct from the discovery of the electron.
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