Question detail
What is the reason an atom has no overall electrical charge when it contains equal numbers of protons and electrons?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Atoms and isotopes
Question
- A. Protons are heavier than electrons.
- B. Electrons are negatively charged and cancel out the positive charge of protons.
- C. Neutrons also contribute to the charge balance.
- D. Protons and electrons have equal but opposite charges.
Answer
The correct answer is D: Protons and electrons have equal but opposite charges..
Explanation
The correct answer is D: Protons and electrons have equal but opposite charges.. This supports the learning objective "Explain why an atom has no overall electrical charge when it contains equal numbers of protons and electrons." in The structure of an atom because it uses the correct atomic and nuclear radiation relationship for Atoms and isotopes. The other options are less suitable because they do not match the required The structure of an atom idea: Protons are heavier than electrons.; Electrons are negatively charged and cancel out the positive charge of protons.; Neutrons also contribute to the charge balance..
Common mistake
Understanding Electrical Charge in Atoms
Students often think that an atom has a charge because it contains protons and electrons.
Emphasize that an atom is neutral overall when it has equal numbers of protons and electrons, as their charges cancel each other out.
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