Phosphorus is a non-metal that sits just below nitrogen in group 15 of the periodic table. This element exists in several forms, of which white and red are the best known. White phosphorus is ...

For instance they discovered phosphorus when they isolated it from ... The zigzag, staircase, line in the diagram of the periodic table above separates the metals, on the left, from non-metals ...

For example, calcium and phosphorus form a strong foundation ... These are almost one-quarter of the periodic table and are mainly found in the first four periods. Of these, 11 are essential ...