Unbinilium, 120 General properties Pronunciation Template:Infobox element/pronunciation Alternative names element 120, eka-radium Standard atomic weight (A r, standard ) Template:Infobox element/standard atomic weight Mass number Template:Infobox element/symbol-to-most-stable-isotope (most stable isotope)Unbinilium in the periodic table Template:Infobox element/periodic table Atomic number (Z ) 120 Group Template:Infobox element/group Period period 8 Block s-block Element category Template:Infobox element/category format , but probably an alkaline earth metal Electron configuration [Og ] 8s2 (predicted) [1] Electrons per shell
2, 8, 18, 32, 32, 18, 8, 2 (predicted) Physical properties Phase at STP solid (predicted) [1] [2] Melting point 953 K (680 °C, 1256 °F) (predicted) [1] Boiling point 1973 K (1700 °C, 3092 °F) (predicted) [3] Density (near r.t. ) 7 g/cm3 (predicted) [1] Heat of fusion 8.03–8.58 kJ/mol (extrapolated) [2] Atomic properties Oxidation states Template:Infobox element/symbol-to-oxidation-state Electronegativity Pauling scale: 0.91 (predicted) [4] [[Ionization energy|Template:Engvar energies]] 1st: 563.3 kJ/mol (predicted) [5] 2nd: 895–919 kJ/mol (extrapolated) [2] Atomic radius empirical: 200 pm (predicted) [1] Covalent radius 206–210 pm (extrapolated) [2] Template:Infobox element/spectral lines Other properties Crystal structure Template:Infobox element/crystal structure (extrapolated) [6] CAS Number 54143-58-7 History Naming IUPAC systematic element name Main isotopes of unbinilium Template:Infobox element/isotopes table | references
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↑ 1.0 1.1 1.2 1.3 1.4 Cite error: Invalid <ref> tag; no text was provided for refs named Haire ↑ 2.0 2.1 2.2 2.3 Bonchev, Danail; Kamenska, Verginia (1981). "Predicting the properties of the 113-120 transactinide elements" . Journal of Physical Chemistry . American Chemical Society. 85 (9): 1177–1186. doi :10.1021/j150609a021 . ↑ Fricke, B.; Waber, J. T. (1971). "Theoretical Predictions of the Chemistry of Superheavy Elements" (PDF) . Actinides Reviews . 1 : 433–485. Retrieved 7 August 2013 . ↑ Pershina, V.; Borschevsky, A.; Anton, J. (2012). "Theoretical predictions of properties of group-2 elements including element 120 andtheir adsorption on noble metal surfaces". The Journal of Chemical Physics . 136 (134317). doi :10.1063/1.3699232 . P = 1.35χM 1/2 − 1.37.↑ Pershina, Valeria. "Theoretical Chemistry of the Heaviest Elements". In Schädel, Matthias; Shaughnessy, Dawn (eds.). The Chemistry of Superheavy Elements (2nd ed.). Springer Science & Business Media. p. 154. ISBN 9783642374661 ↑ Seaborg, Glenn T. (1969). "Prospects for further considerable extension of the periodic table" (PDF) . Journal of Chemical Education . 46 (10): 626–634. doi :10.1021/ed046p626 . Retrieved 22 February 2018 .