00:01
So the coordination number of the metal ion in a complex is basically the number of molecules, atoms, or ions or ligands that are directly bound to that central metal atom or ion is called the coordination number of that central metal ion.
00:22
So for example, if in a complex there are four ligands or molecules or atoms that are bound.
00:31
To the central metal ion then the coordination number of that central metal ion will be four and to find the oxidation state or the oxidation number of the central metal ion in a complex we can use a formula like this for finding oxidation state or number the formula is if x is the oxidation number of the central metal atom, then we have a formula like this x plus total charge on the ligand.
01:23
This is equal to net charge on the complex.
01:37
So let's go to the first example.
01:41
Then it will be more clear how we are doing this.
01:44
So in first one, we have c .o.
02:02
N .h .3.
02:06
5 br 2 plus.
02:17
So here our central metal ion is cobalt and we have 5 n .h .3 molecule and one bromide ion as the ligand...