00:01
In this problem, we are understanding the placement of the blocks on the periodic table.
00:09
So the word blocks is a little bit confusing because this doesn't give us really any intuition of what this means.
00:17
When we're talking about spd and f blocks, what we're really saying is the placement of the electrons in the specified orbitals.
00:29
Now, what does that mean? that means that when we look at the different placements of electrons in the various blocks, the electrons are in different states within the atom.
00:44
So that's where these letters are coming from.
00:48
These are actually specified electronic states that are called sp, d, and f.
00:54
And when you get to chemistry, later on, if you choose to do so, this is going to come up very often.
01:01
So this is a specified sketch of the periodic table.
01:07
Now, this would be hydrogen and helium.
01:09
They are both 1s, which is a little bit confusing, but they are 1s atoms.
01:16
This portion of the periodic table, which are these are the metals, right? these are the first and second group...