Describe, in detail, the arrangement of the periodic table, and how it compares to some card games. Describe the rows and columns. What do they tell us about the elements in each row or column? What other trends are on the periodic table?

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?