Stories About Chemistry
and a Gaseous (?) Metal
All the metals are solids, harder or softer. Such is the general rule. But there are exceptions.
Some metals are more like liquids. A chip of gallium or cesium melts on your palm, because the melting point of these metals is just below thirty degrees Celsius (86°F). Francium, which has not been prepared as the pure metal so far, would melt at room temperature.
Mercury is a classical example of a liquid metal which everybody knows. It freezes at minus 39°C (-38.2°F), which makes it eligible for various kinds of thermometers.