Periodic Table:

The modern periodic table,based on atomic number and electron configuration, was created primarily by aRussian chemist, Dmitri Ivanovich Mendeleev, and a German physicist, JuliusLothar Meyer, both working independently. They both created similar periodictables only a few months apart in 1869. Mendeleev created the first periodictable based on atomic weight. He observed that many elements had similarproperties, and that they occur periodically. Hence, the table’s name. His periodic law states thatthe chemical and physical properties of the elements vary in a periodic waywith their atomic weights. The modern one states that the properties vary withatomic number, not weight. Elements in Mendeleev's table were arranged in rowscalled periods. The columns were called groups. Elements of each group hadsimilar properties. The periodic table can be divided into ten families ofelements exhibiting common characteristics. These images try to illustratethose characteristics using abstract photography