An element has an atomic number of 13 and a mass number of 27. How many neutrons are present in the nucleus of this atom?

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A 13
B 14
C 27
D 40

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Answer: B. 14

Explanation: The mass number is the total number of protons and neutrons in the nucleus, while the atomic number represents the number of protons. To find the number of neutrons, subtract the atomic number from the mass number: 27 - 13 = 14 neutrons.

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An element has an atomic number of 13 and a mass number of 27. How many neutrons are present in the nucleus of this atom?

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