00:01
Hello, in the question we have to calculate the effective nuclear charge on 3d electron.
00:07
So we have to calculate effective nuclear charge on 3d electron for of fe whose atomic number is equal to 26.
00:43
So, let us first write out the electronic configuration.
00:47
So, the electronic configuration now which we will be writing will be of this form.
00:56
So, actually the electronic configuration is 1s square 2s square 2p6 3s square 3p6 then we have 4s 2 and 3d 6.
01:20
So, this is the electronic configuration for the iron.
01:26
Now, so we have to find out the z effective over here.
01:32
So, the formula is z minus s where s is the screening constant sorry shielding constant.
01:43
So, now we have to find out this s over here.
01:49
So, now initially so we have to find out for 3d.
01:56
So, 3d and their lower shells will be considered for the screening.
02:04
So, now so we have to find out 3d.
02:10
So, n is equal to 3.
02:14
So, for n is equal to 3 what are the shells over here.
02:19
So, we have 3d let us arrange with the order.
02:24
So, it will be 3s square 3p6 and 3d 6.
02:30
So, how many number of electrons are there over here.
02:34
So, there are total 14 but here the number of electrons we will consider as equal to 13 because one electron according to which we are considering the screening effect the shielding effect.
02:49
So, that is not included...