1 J41 Hydrogen Grp 1
2 J42 Alkali Metals Grp 1
3 J43 Alkali Earth Metals Grp 2
4 J44 Transition Metals Grp 3-12
5 J45 Lanthinides and Actinides
6 J46 Halogens Grp 17
7 J47 Noble Gases Grp 18
8 J48 Semi Metals
I liked how a student said he would be able to fit all this in his agenda by writing J42-48 Parts of the Periodic Table.
