# How does the reactivity of metals change from top to bottom on the periodic table?

And this is certainly observed in the alkali metal series. Both lithium and sodium are quite active metals, however, potassium (and its alloys) are pretty hairy metals to handle, and WILL ignite ethyl alcohol should you attempt to quench the metal with this solvent. A different solvent mix must used to destroy residues of these metals. $N a K$ alloy, conveniently a liquid at room temperature, is even more reactive than the parent potassium...