1. History of the Periodic Table
2. Group IA
3. Group IB
4. Group IIA
5. Group IIB
6. Group IIIA
7. Group IIIB
8. Group IV-A
9. Group IV-B
10. Group V-A
11. Group V-B
12. Group VIA
13. Group VIB
14. Group VIIA
15. Group VIIB
16. Group VIIIA
17. Group VIII