Question

How many neutrons are in an isotope of nitrogen-16?
A. 14
B. 9
C. 10
D. 7

Answer 1

mass number = number of protons + number of neutrons
number of protons = atomic number =7
number of neutrons= mass number -  number of protons=16-7=9
Answer is B.9.

Answer 2

9 neutrons are in an isotope of nitrogen-16. Hence, option B is correct.

What is a mass number?

Mass number = number of protons + number of neutrons

Number of protons = atomic number =7

Number of neutrons= mass number -  number of protons

=16-7

=9

Hence, 9 neutrons are in an isotope of nitrogen-16.

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