00:02
Hello, in this question, we are trying to find which atoms or ions are going to be isoelectronic with the sulfur with a 2 plus charge.
00:14
So first of all, let's define iso electronic.
00:23
The prefix iso means same.
00:27
So this means the same number of electrons.
00:37
So we are looking for all of the atoms or ions that have the same number of electrons as so.
00:45
Sulfur with a 2 plus charge.
00:55
Okay, so s2, sulfur is atomic number 16.
01:02
And a positive ion means that it has lost electrons, because if we think about it, it's going to have 16 protons or 16 positive charges.
01:12
So to have a 2 plus charge, it must only have 14 electrons.
01:16
It has lost two electrons.
01:20
So sulfur with a plus 2 plus charge has 14 electrons.
01:25
So that's the one we are trying to match.
01:28
So let's go on and see which others have 14 electrons or our isoe electronic.
01:35
So our first option is silicon with a 4 plus charge.
01:42
Silicon is number 14.
01:44
4 plus charge means it has lost 4 electrons.
01:47
So 14 minus 4 is 10 electrons.
01:51
This one is not a match.
01:53
Next we have chlorine, which is number 17, and it has a 3 plus charge.
02:01
So 17 minus 3 gives us 14 electrons.
02:07
So yes, this ion would be isoelectric with the sulfur.
02:15
Right...