See if you catch the guy calling MANGANESE by the wrong name (twice), even though the photo shows Mn, he says something different.
He talks about the fancy sub-orbitals that you don’t really know about in the transition metals. The atoms have electrons in orbitals, but really they exist in sub-orbitals inside of the general orbitals listed on our periodic table. Note the part about “PAIRING” and being more stable, less available to get let go of by the atoms into the “sea”.
