Question detail
Explain why 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
Question
Type
exam_style
Style
Topic
Atoms and isotopes
Question
Explain why an atom has no overall electrical charge when it contains equal numbers of protons and electrons.
Answer
An atom has no overall electrical charge because the positive charge of protons is balanced by the negative charge of electrons. Since they are equal in number, the charges cancel each other out, resulting in a neutral atom.
Explanation
This question assesses the student's ability to explain the concept of electrical neutrality in atoms. It requires an understanding of charge balance, which is fundamental to atomic theory and the behavior of matter.
Common mistake
Relative Mass Comparison Mistake
Students often confuse the relative masses of protons, neutrons, and electrons, thinking they are all similar.
Remember that protons and neutrons have a relative mass of approximately 1, while electrons have a much smaller relative mass of about 1/1836.
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