What is the number of protons plus the number of neutrons in the nucleus of an atom equivalent to?

Read the sentences below in 1962, i tried to enroll as the first black student at the university of mississippi. the governor of mississippi blocked my entrance which best describes the verbs used in the sentences? o they are past tense verbs, which are often used in narrative essays o they are past tense verbs, which are not often used in narrative essays. o they are future tense verbs, which are often used in narrative essays o they are future tense verbs, which are not often used in narrative essays.

The total number of electrons is 14

The answer is d. hope i !

D=m/v =57.9/3 = 19.3 g/cm^3