He would have concluded that the order of operations would be different. This therefore would affect the periodic table's order.
You can take two liquids of different densities (how much mass is in a given volume) and pour them into a funnel. An example is oil and water. When the mixture settles, the denser liquid will be at the bottom, and drips through the funnel first. This is a separation that you can just let occur naturally.
Intercourse between two beings, usually male and female to procreate.