Some alkali metals have been known and put to good use long before Mendeleev created the periodic table. For instance, the Old Testament mentions salt – a combination of the alkali metal sodium ...

Free interactive and download to print GCSE Chemistry flashcards to help prepare for your GCSE exams. Revise topics such as atoms, elements and compounds, mixtures, atomic structure, Mendeleev's ...

Element 119 (also known by its placeholder name, Ununennium) would be the first entry on the table’s eighth row. It’s expected to have the characteristics of an alkali metal.