00:01
So for this problem, we're giving a sulfur 2 plus ion, and we want to know which of the other ions supplied our isoelectric with this sulfur 2 plus ion.
00:13
In other words, we're looking for which of these other six ions have the same number of electrons as this sulfur 2 plus.
00:23
So the easiest way to think about this problem is first to determine what the base electron configuration for the sulfur 2 plus is.
00:33
So if we remove two electrons from sulfur, its electron configuration is essentially going to be the same as silicon.
00:43
So we basically just need to walk through this list of ions here below and determine which of them include silicon.
00:50
So obviously right off the bat, we can circle silicon as an answer because it's going to have the same electron configuration as sulfur 2 plus.
00:59
If we next consider silicon 4 plus, well, since silicon is an answer, silicon 4 plus is pretty much already out.
01:09
Next if we consider chlorine 3 plus, if we walk back three spaces from chlorine, we land on silicon...