Although it's melting point is known, there is so little of this element in existence that it's unlikely you'll ever see a picture of this element in liquid form. Francium is the most electropositive of all the elements. Francium having symbol Fr and atomic number 87 is a radioactive and reactive metal, melts around 300 K. Caesium Standard atomic weight: 32.905 4519(2) Melting point: 28.44 C Boiling point: 671 C Radioactivity: mostly naturally stable some isotopes (137Cs). Other than Gallium and Cesium, Francium and Rubidium can melt at body temperature. Melting Point (oC) Melting Point (oF) Crystal Structure. Check out this article to find out more Metal. We also created a list of metals with the highest melting point. Melting Point: 28.44 C: Boiling Point: 671 C: Absolute Melting Point. Cesium is one of four metals that are liquid at or near room temperature the others are mercury (melting point of minus 37.9 F, or minus 38.8 C), gallium (melting point of 85.6 F, or 29.8 C) and. 15 lowest melting point metals: Mercury, Francium, Cesium, Gallium, Rubidium, Potassium, Sodium, Indium, Lithium, Tin, Polonium, Bismuth, Thallium, Cadmium, and Lead. Therefore, the correct answer is Gallium and Caesium. Complete and detailed technical data about the element Cesium in the Periodic Table. It is the most electropositive metal and has the. In the paper they specify specifically that the density is for the liquid case, on wikipedia it might (I'm not sure) be the density for the solid case at the melting point.Hint:There are two metals that are liquid at the technically designated room temperature or 298 K ($C\]. Physical Properties Cesium is a soft, silver-white metal that is very ductile and has a low melting point. The jump at the melting point is from the mismatch between the paper and wikipedia. Plotting the information that we have from the paper and from wikipedia yields: Caesium nitrate or cesium nitrate is a salt with the chemical formula Cs N O 3. This shows that the density reduces with temperature. Melting point: 414 ☌ (777 ☏ 687 K) Boiling point: decomposes, see text: Solubility in water. Caesium is a soft, silvery-gold alkali metal with a melting point of 28.5 C, which makes it one of only five elemental metals that are liquid at or near room temperature. $$\rho= 1829.12- 0.61483 \left(T-T_\right) $$ Caesium is a chemical element with atomic number 55 which means there are 55 protons and 55 electrons in the atomic structure. In the range of 302 to 375 K to be exact.įrom their experimental data they deduce the following approximate equation for the density as a function of the temperature: It forms yellow-orange hexagonal crystals. Looking at the wikipedia page you can see that the density is $\rho=1.93$ kg/l at room temperature and $\rho=1.843 kg/l$ at it's melting point.Īdditional information can be found in this paper, where they experimentally explore the density of liquid Cesium in the vicinity of its melting point. Caesium monoxide, (Cs 2 O), often simply Caesium oxide, is the simplest and most common oxide of the caesium.
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