🤓 Based on our data, we think this question is relevant for Professor Kelly's class at UCB.
We are being asked to determine the electron configuration of the phosphide ion, P3-.
To do this, we can determine the ground-state electron configuration of Phosphorus (P) by referring to the periodic table and locating the position of P in the periodic table.
Ground-state means that the element is in its lowest energy form (not in excited state).
What is the electron configuration for a phosphide ion?