Our bodies require other elements, including non-metal elements such as phosphorus (P), sulphur (S ... These are almost one-quarter of the periodic table and are mainly found in the first four ...
Elements in group 1 and group 2 are metals ... See the study guide on groups in the periodic table for more information.
The periodic table - AQA Mendeleev made an early periodic table. In the modern periodic table, elements are in order of atomic number in periods and groups. Electronic structures model how ...