An isotope has an atomic number of 17 and a mass number of 36. Which of the following gives the correct number of neutrons and protons in an atom of the isotope?
-
A.
Neutrons 53, Protons 17 -
B.
Neutrons 17, Protons 36 -
C.
Neutrons 19, Protons 17 -
D.
Neutrons 36, Protons 17
Correct Answer: Option C
Explanation
Mass number = number of protons + number of neutrons
36 = 17 + X; X = 36 -17 = 19
19 neutrons and 17 protons