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QuizMultiple Choice

Atoms — Quiz

Question 1 • Physical Science

Which statement best explains why the overall charge on an atom is zero?

Answer
A
The positive charge of the neutrons in the nucleus equals the negative charge in the electron cloud.
B
The negative charge of the neutrons in the nucleus equals the positive charge in the electron cloud.
C
The positive charge of the protons in the nucleus equals the negative charge in the electron cloud.
D
The negative charge of the protons in the nucleus equals the positive charge in the electron cloud.

Explanation

Protons have a positive charge, while electrons in the electron cloud have a negative charge. In a neutral atom, the number of protons equals the number of electrons, so their charges have equal magnitude and cancel out. Neutrons have no electric charge. Therefore, the statement that the positive charge of the protons equals the negative charge in the electron cloud is correct.

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