Search results
Results from the WOW.Com Content Network
Francium's melting point was estimated to be around 8.0 °C (46.4 °F); [11] a value of 27 °C (81 °F) is also often encountered. [8] The melting point is uncertain because of the element's extreme rarity and radioactivity; a different extrapolation based on Dmitri Mendeleev's method gave 20 ±
The Gmelin rare earths handbook lists 1522 °C and 1550 °C as two melting points given in the literature, the most recent reference [Handbook on the chemistry and physics of rare earths, vol.12 (1989)] is given with 1529 °C.
The melting point of a substance is the point where it changes state from solid to liquid while the boiling point of a substance (in liquid state) is the point where the vapour pressure of the liquid equals the environmental pressure surrounding the liquid [102] [103] and all the liquid changes state to gas.
Francium's melting point was estimated to be around 8.0 °C (46.4 °F); a value of 27 °C (81 °F) is also often encountered. The melting point is uncertain because of the element's extreme rarity and radioactivity; a different extrapolation based on Dmitri Mendeleev's method gave 20 ± 1.5 °C (68.0 ± 2.7 °F). A calculation based on the ...
Ununennium is predicted to have a melting point between 0 °C and 30 °C: thus it may be a liquid at room temperature. [6] It is not known whether this continues the trend of decreasing melting points down the group, as caesium's melting point is 28.5 °C and francium's is estimated to be around 8.0 °C. [88]
87 Fr francium; use: ca. 2 WEL: about 2 88 ... Values refer to the enthalpy change between the liquid phase and the most stable solid phase at the melting point ...
Melting point: 590 °C (1,094 °F; 863 K) Boiling point: 1,275 °C (2,327 °F; 1,548 K) ... Francium chloride is a radioactive chemical compound with the formula FrCl ...
Analytical Chemistry of Technetium, Promethium, Astatine, and Francium. Translated by R. Kondor. Ann Arbor–Humphrey Science Publishers. p. 269. ... Melting points ...