The periodic table is a well-organized chart that contains all the known elements in the universe. These elements are ...

Meyer's roots, however, were firmly in Germany. Meyer was just four years older than Mendeleev, and produced several Periodic Tables between 1864-1870. His first table contained just 28 elements, ...

It's important to use the names and chemical symbols for the first 20 elements in the periodic table, as well as the elements in groups 1 and 7.

Elements are arranged in the periodic table in order of increasing atomic ... up to a maximum of 8 electrons (only true for the first 20 elements). Example: sodium has the electron arrangement ...