Just four years before Mendeleev announced his periodic table, Newlands noticed that there were similarities between elements with atomic weights that differed by seven. He called this The Law of ...

The periodic table arranges all the chemical elements in a specific way. Patterns are visible in the way that elements behave, and this allows us to make predictions about other elements.

Or, more specifically, the periodic elements ... and you are invited to physically draw your two chosen elements together. You’re then presented with the resulting compound, which has its ...