The mass of an element is 27 and its atomic number is 13. What is the composition of the nucleus of its atom?

A. 13 electrons and 14 protons
B. 13 neutrons and 14 protons
C. 13 protons and 14 neutrons
D. 13 electrons and 14 neutrons

Correct Answer: Option C

C. 13 protons and 14 neutrons