General Knowledge - General Science - Discussion

Four elements melt just a few degrees above room temperature.

Francium(Fr), a radioactive and extremely reactive metal, melts around 300 K. The false color image at left shows 10,000 francium atoms in a laser trap. (For more about francium, see the Orozco group's francium research page at SUNY-Stony Brook. ).

Cesium(Cs), a soft metal that violently reacts with water, melts at 301.59 K. Like francium, cesium's low melting point and softness is a consequence of the size of its atoms: Cs atoms are larger than those of any other known element. The positive charge of a Cs+ core is spread over the atom's large surface area, and less energy is required to push Cs atoms out of place in the metal.

Gallium(Ga), a grayish metal, melts at 303.3 K. Gallium's near-ambient melting point is sometimes demonstrated with a picture of a gallium rod liquefying in someone's bare hand. Wear gloves if you try this yourself: Gallium causes skin rashes and can depress bone marrow function.

Rubidium(Rb), another soft reactive metal, melts at 312.46 K.

Never heard of Francium. I have heard that Mercury and Bromine are liquid temperature and Cesium and Gallium are liquid at a temperature slightly above room temperature.

Still confused ?

I googled it and found that Francium has it's melting point at 27 degree centigrade. Therefore the state completely depends on the room pressure it is kept in. At normal STP (Standard Pressure and Temperature) it is, however, solid!

A few elemental metals are liquid at or near room temperature. The most well known is mercury (Hg), which is molten above −38.8 °C (234.3 K, −37.9 °F). Others include caesium(Cs), which has a melting point of 28.5 °C (83.3 °F), rubidium (Rb)(39 °C [102 °F]), francium (Fr)(estimated at 27 °C [81 °F]), and gallium (Ga)(30 °C [86 °F])

Liquids around room temperature.

The only liquid elements at standard temperature and pressure are bromine (Br) and mercury (Hg).

Although, elements caesium (Cs), rubidium (Rb), Francium (Fr) and Gallium (Ga) become liquid at or just above room temperature.

Liquids around room temperature. The only liquid elements at standard temperature and pressure are bromine (Br) and mercury (Hg). Although, elements caesium (Cs), rubidium (Rb), Francium (Fr) and Gallium (Ga) become liquid at or just above room temperature.

Liquids around room temperature. The only liquid elements at standard temperature and pressure are bromine (Br) and mercury (Hg). Although, elements caesium (Cs), rubidium (Rb), Francium (Fr) and Gallium (Ga) become liquid at or just above room temperature.

Actually seeing, the only elements which are at liquid state at room temperature are Mercury (Hg) and Bromine (Br). But elements like Caesium[Cs]and Gallium (Ga) or Francium (Fr) are in liquid state slightly above the room temperature.

The only liquid elements at standard temperature and pressure are bromine(Br) and mercury (Hg). Although, elements caesium(Cs) , rubidium(Rb) , Francium(Fr) and Gallium(Ga) become liquid at or just above room temperature.

Two elements are liquid at room temperature :
Bromine & Mercury.

Four elements melt just a few degrees above room temperature :
Francium (Fr).
Cesium (Cs).
Gallium (Ga).
Rubidium (Rb).

The melting points of alkali metals were plotted and based on the information francium's melting point was extrapolated to less then room temperature.