Question detail
An atom has a mass number of 12 and an atomic number of 6. How many neutrons does it contain?
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. 6
- B. 12
- C. 18
- D. 4
Answer
6
Explanation
6 is correct because the worked solution uses neutrons = mass number - atomic number and substitutes the values from the question. This keeps activity, count rate, atomic number, mass number and neutron count distinct for Atomic structure.
Common mistake
Common Mistake in Neutron Calculation
Students often forget to subtract the atomic number from the mass number when calculating the number of neutrons.
Remind students to use the formula: Number of Neutrons = Mass Number - Atomic Number, and to clearly identify each value before performing the subtraction.
Related flashcards
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