00:02
Hi there.
00:03
In this question, we are asking which of these substances are isoelectronic? so, isoelectronic means two things.
00:11
One is having the same number of valence electrons.
00:26
And the other is that they have the same atom arrangement or the same atom connectivity.
00:44
So the atoms are connected the same way.
00:49
All right.
00:49
So let's look at what we have here and figure out if any of these, are iso -electronic with each other.
00:56
First thing we have is s -o -3.
00:58
So we have one central atom and three atoms attached to it.
01:04
So let's figure out the number of valence electrons.
01:07
Sulfur is in group six of the periodic table.
01:10
So it has six valence electrons.
01:13
Oxygen is also in group six.
01:14
So there are three of those with six valence electrons each, giving us 24 valence electrons.
01:25
All right.
01:25
Our next one is nf3.
01:33
Nitrogen is in group five of the periodic table, so it has five valence electrons.
01:39
Each fluorine is a halogen.
01:42
So each of those has seven.
01:44
So this gives us 26 valence electrons...