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Chemistry, 27.03.2021 21:40 queenhall934

13. An atom has a mass number of 12 and an atomic number of 7. How many neutrons does it contain?
A5
B. 7
C. 12
D. 19
[1 mark]

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13. An atom has a mass number of 12 and an atomic number of 7. How many neutrons does it

contain?

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13. An atom has a mass number of 12 and an atomic number of 7. How many neutrons does it contain?

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