00:02
Hey there, in this question we need to write the electron configuration for tin.
00:07
Tin is sn and its atomic number is 50 on the periodic table.
00:12
And they tell us that we need to use the building up principle.
00:16
That's also known as the aufbau principle.
00:20
And what that means is that the electrons fill the orbitals in order of increasing energy.
00:36
Or also known as the building up principle.
00:40
All right, so let's go ahead and get started.
00:43
Tin is atomic number 50.
00:45
That means it has 50 protons.
00:47
But it's also therefore going to have 50 electrons since it's a neutral atom.
00:53
So we need to write the electron configuration for 50 electrons.
00:57
Starting with the lowest energy orbital, the 1s.
01:01
S orbitals hold a maximum of 2.
01:03
So we have 1s2.
01:05
The next in terms of increasing energy is the 2s.
01:08
Being an s it also holds 2.
01:11
And this is followed by the 2p.
01:13
P orbitals can hold a maximum of 6 electrons.
01:16
Because there are 3 orientations when we have p orbitals.
01:21
And we put 2 electrons in each of those orientations.
01:25
All right, so next we have 3s.
01:29
That would be 3s2 because it's an s.
01:32
Followed by 3p which would be 6...