The total numbers of neutrons, protons, and electrons in 31P3- are:
A) 15 neutrons, 31 protons, 15 electrons
B) 16 neutrons, 15 protons, 18 electrons
C) 31 neutrons, 15 protons, 18 electrons
D) 15 neutrons, 16 protons, 12 electrons
E) 16 neutrons, 16 protons, 18 electrons

Question

Quizplus · Accepted Answer

Phosphorus-31 has 15 protons and 16 neutrons. As a 3- ion, it has gained 3 electrons, totaling 18 electrons.

The Total Numbers of Neutrons, Protons, and Electrons in 31P3-