The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic ...

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

When the first periodic table was formulated by Mendeleev ... But this alleged element, given various names such as davyum, illenium, lucium and nipponium, turned out to be spurious.