Meyer’s table was comprised of 44 elements arranged by valency; Odling’s version arranged 57 elements by their atomic weight ... Periodic Law of the elements has been so remarkable that the history of ...

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 ...

In this periodic table of elements quiz, you have 10 minutes to name as many elements as you can, given only their symbol, ...

All substances have properties. These describe how a subject looks and behaves. Substances have both physical and chemical properties. Developing the periodic table The periodic table was ...