D 14 3
N
7
What is the number of protons, neutrons, and electrons?

14

Explanation:

For example, silicon has 14 protons and 14 neutrons. Its atomic number is 14 and its atomic mass is 28. The most common isotope of uranium has 92 protons and 146 neutrons. Its atomic number is 92 and its atomic mass is 238 (92 + 146).

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a