This temperature/pressure combo is often called 'room conditions.' Two elements are liquid in their standard state: mercury and bromine. Eleven elements are gas in their standard state. All of the noble gases (He, Ne, Ar, Kr, Xe, Rn) as well the halogens flourine and chlorine.

Diphenylmercury is the organomercury compound with the formula Hg(C 6 H 5) 2. It is a white solid. The compound is of historic interest as a particularly stable organometallic compound but it finds few uses because of its high toxicity. Preparation. Commercially available, this compound can be prepared by several routes. and mercury (CsHg2 melting point, 208' C (or 481 K)). The thermodynamic properties of the liquid alloys were calculated from the emf values and their temperature coefficients for concentration cells of the type Fe, Csz ICs+ in glass I Csz(XCs)Hgz(l -in which the change of state in the cell may be expressed by the equation CS(~)= Cs (in