Question 1
Question detail
How do you calculate the number of neutrons in an atom?
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. Mass number minus atomic number
- B. Atomic number minus mass number
- C. Mass number plus atomic number
- D. Atomic number plus mass number
Answer
The correct answer is A: Mass number minus atomic number.
Explanation
The correct answer is A: Mass number minus atomic number. This supports the learning objective "Define atomic number as the number of protons in the nucleus of an atom." in Mass number, atomic number and isotopes 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 Mass number, atomic number and isotopes idea: Atomic number minus mass number; Mass number plus atomic number; Atomic number plus mass number.
Common mistake
Confusing Atomic Number and Mass Number
Students often confuse atomic number with mass number, thinking both refer to the same quantity.
Remind students that atomic number is the number of protons in the nucleus, while mass number is the total number of protons and neutrons.
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