Exam-style question
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An ion has 10 protons and 8 electrons. What is the charge of this ion?.
- A.+2
- B.-2
- C.0
- D.+1
Model answer
What a good answer should say
- +2
Explanation
Why this works
The charge of an ion is determined by the difference between the number of protons and electrons. Here, 10 protons and 8 electrons result in a charge of +2 (10 - 8 = +2).
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