How many protons (p),neutrons (n),and electrons (e)are in one atom of
?
A)12 p,12 n,12 e
B)12 p,11 n,12 e
C)12 p,11 n,10 e
D)12 p,11 n,14 e

Question

How many protons (p),neutrons (n),and electrons (e)are in one atom of 
?
A)12 p,12 n,12 e 
B)12 p,11 n,12 e 
C)12 p,11 n,10 e 
D)12 p,11 n,14 e

Quizplus · Accepted Answer

The atomic number of the element (11) tells us there are 11 protons in the nucleus. The given symbol (TB4939_11) indicates the atomic mass is 23, which means there are 23 - 11 = 12 neutrons. In a neutral atom, the number of electrons is equal to the number of protons, so there are also 11 electrons. Choice B matches these numbers.

How Many Protons (P),neutrons (N),and Electrons (E)are in One Atom