The majority of metals listed on the period table of elements are solids at room temperature or 71.6 degrees Fahrenheit, with mercury being an exception since it solidifies at -38.2 degrees. Metals such as cesium, francium and gallium are listed as liquids on the periodic table of elements because they melt at temperatures of between 80.6 F and 98.6 degrees.
The one metal that melts at room temperature, which is mercury, is a very toxic metal and should not be inhaled, applied to skin or digested. Mercury is freely flowing in its liquid form, and it can be alloyed with other metals like cadmium, zinc, gold and silver. The element mercury is assigned the period number 6, group number 12 and the atomic number 80 on the periodic table of elements.