Scientific Disciplines and Anthroposophy

> First question: How do the various qualities of heat, light, electricity and the different states actually relate to the periodic system and how did the periodic system come about? > Second question: In the alchemical literature, chemical substances are classified in such a way as to indicate how the individual metals are assigned to the planets. How does this sevenfold classification of the assignment of metals to planets relate to that found in the periodic system?