Hypothetical chemical element, symbol Ubn and atomic number 120
"Ubn" redirects here. For other uses, see UBN (disambiguation).
Chemical element, symbol Ubn and atomic number 120
Unbinilium, 120Ubn
Theoretical element
Unbinilium
Pronunciation
/ˌuːnbaɪˈnɪliəm/(OON-by-NIL-ee-əm)
Alternative names
element 120, eka-radium
Unbinilium in the periodic table
Hydrogen
Helium
Lithium
Beryllium
Boron
Carbon
Nitrogen
Oxygen
Fluorine
Neon
Sodium
Magnesium
Aluminium
Silicon
Phosphorus
Sulfur
Chlorine
Argon
Potassium
Calcium
Scandium
Titanium
Vanadium
Chromium
Manganese
Iron
Cobalt
Nickel
Copper
Zinc
Gallium
Germanium
Arsenic
Selenium
Bromine
Krypton
Rubidium
Strontium
Yttrium
Zirconium
Niobium
Molybdenum
Technetium
Ruthenium
Rhodium
Palladium
Silver
Cadmium
Indium
Tin
Antimony
Tellurium
Iodine
Xenon
Caesium
Barium
Lanthanum
Cerium
Praseodymium
Neodymium
Promethium
Samarium
Europium
Gadolinium
Terbium
Dysprosium
Holmium
Erbium
Thulium
Ytterbium
Lutetium
Hafnium
Tantalum
Tungsten
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Platinum
Gold
Mercury (element)
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Lead
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Polonium
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Radon
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Radium
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Thorium
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Hassium
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Darmstadtium
Roentgenium
Copernicium
Nihonium
Flerovium
Moscovium
Livermorium
Tennessine
Oganesson
Ununennium
Unbinilium
Unquadtrium
Unquadquadium
Unquadpentium
Unquadhexium
Unquadseptium
Unquadoctium
Unquadennium
Unpentnilium
Unpentunium
Unpentbium
Unpenttrium
Unpentquadium
Unpentpentium
Unpenthexium
Unpentseptium
Unpentoctium
Unpentennium
Unhexnilium
Unhexunium
Unhexbium
Unhextrium
Unhexquadium
Unhexpentium
Unhexhexium
Unhexseptium
Unhexoctium
Unhexennium
Unseptnilium
Unseptunium
Unseptbium
Unbiunium
Unbibium
Unbitrium
Unbiquadium
Unbipentium
Unbihexium
Unbiseptium
Unbioctium
Unbiennium
Untrinilium
Untriunium
Untribium
Untritrium
Untriquadium
Untripentium
Untrihexium
Untriseptium
Untrioctium
Untriennium
Unquadnilium
Unquadunium
Unquadbium
Ra ↑ Ubn ↓ —
ununennium ← unbinilium → unbiunium
Atomic number (Z)
120
Group
group 2 (alkaline earth metals)
Period
period 8 (theoretical, extended table)
Block
s-block
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
(+1),[4] (+2), (+4), (+6) (predicted)[1][5]
Electronegativity
Pauling scale: 0.91 (predicted)[6]
Ionization energies
1st: 563.3 kJ/mol (predicted)[7]
2nd: 895–919 kJ/mol (extrapolated)[2]
Atomic radius
empirical: 200 pm (predicted)[1]
Covalent radius
206–210 pm (extrapolated)[2]
Other properties
Crystal structure
body-centered cubic (bcc)
(extrapolated)[8]
CAS Number
54143-58-7
History
Naming
IUPAC systematic element name
Isotopes of unbinilium
Experiments and theoretical calculations
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Unbinilium, also known as eka-radium or element 120, is a hypothetical chemical element; it has symbol Ubn and atomic number 120. Unbinilium and Ubn are the temporary systematic IUPAC name and symbol, which are used until the element is discovered, confirmed, and a permanent name is decided upon. In the periodic table of the elements, it is expected to be an s-block element, an alkaline earth metal, and the second element in the eighth period. It has attracted attention because of some predictions that it may be in the island of stability.
Unbinilium has not yet been synthesized, despite multiple attempts from German and Russian teams. Experimental evidence from these attempts shows that the period 8 elements would likely be far more difficult to synthesise than the previous known elements. New attempts by American, Russian, and Chinese teams to synthesize unbinilium are planned to begin in the mid-2020s.
Unbinilium's position as the seventh alkaline earth metal suggests that it would have similar properties to its lighter congeners; however, relativistic effects may cause some of its properties to differ from those expected from a straight application of periodic trends. For example, unbinilium is expected to be less reactive than barium and radium and be closer in behavior to strontium, and while it should show the characteristic +2 oxidation state of the alkaline earth metals, it is also predicted to show the +4 and +6 oxidation states, which are unknown in any other alkaline earth metal.
^ abcdefHoffman, Darleane C.; Lee, Diana M.; Pershina, Valeria (2006). "Transactinides and the future elements". In Morss; Edelstein, Norman M.; Fuger, Jean (eds.). The Chemistry of the Actinide and Transactinide Elements (3rd ed.). Dordrecht, The Netherlands: Springer Science+Business Media. ISBN 978-1-4020-3555-5.
^ abcdBonchev, Danail; Kamenska, Verginia (1981). "Predicting the properties of the 113-120 transactinide elements". Journal of Physical Chemistry. 85 (9). American Chemical Society: 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.
^Thayer, John S. (2010). "Relativistic Effects and the Chemistry of the Heavier Main Group Elements". Relativistic Methods for Chemists. Challenges and Advances in Computational Chemistry and Physics. 10: 84. doi:10.1007/978-1-4020-9975-5_2. ISBN 978-1-4020-9974-8.
^Cao, Chang-Su; Hu, Han-Shi; Schwarz, W. H. Eugen; Li, Jun (2022). "Periodic Law of Chemistry Overturns for Superheavy Elements". ChemRxiv (preprint). doi:10.26434/chemrxiv-2022-l798p. Retrieved 16 November 2022.
^Pershina, V.; Borschevsky, A.; Anton, J. (2012). "Theoretical predictions of properties of group-2 elements including element 120 and their adsorption on noble metal surfaces". The Journal of Chemical Physics. 136 (134317). doi:10.1063/1.3699232. This article gives the Mulliken electronegativity as 2.862, which has been converted to the Pauling scale via χP = 1.35χM1/2 − 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.
Unbinilium, also known as eka-radium or element 120, is a hypothetical chemical element; it has symbol Ubn and atomic number 120. Unbinilium and Ubn are...
Unbinilium (120Ubn) has not yet been synthesised, so all data would be theoretical and a standard atomic weight cannot be given. Like all synthetic elements...
most often refers to: Carmine, a food colourant with the E number E120 Unbinilium, also known as element 120 or eka-radium, a predicted chemical element...
March–April 2007, in hope of creating element 120 (unbinilium) from nuclei of 58Fe and 244Pu. Isotopes of unbinilium are predicted to have alpha decay half-lives...
to: January 20 (month-day date notation) Search for "120" on Wikipedia. Unbinilium, a hypothetical chemical element with atomic number 120 CXX (disambiguation)...
to: Chinggis Khaan International Airport, near Ulaanbaatar, Mongolia Unbinilium, hypothetical chemical element with symbol Ubn Union Bank of Nigeria,...
explain the spectrum of Przybylski's Star by naturally occurring flerovium, unbinilium, and unbihexium. Using the 1979 IUPAC recommendations, the element should...
mostly hold quite similarly for the corresponding alkaline earth metals unbinilium (Ubn) and unhexhexium (Uhh).: 1729–1733 Unsepttrium, element 173, may...
of the periodic table. The next two elements, ununennium (Z = 119) and unbinilium (Z = 120), have not yet been synthesized. They would begin an eighth period...
involve flerovium forming chemical bonds. Island of stability: Flerovium–Unbinilium–Unbihexium Isotopes of flerovium Extended periodic table Portal: Chemistry...
Etymology Symbol Pronunciation Example 0 nil Latin nihil ("nothing") n /nɪl/ unbinilium 1 un Latin unus ("one") u /uːn/ unbiunium 2 bi Latin bis ("twice") b /baɪ/...
imply that the most stable spherical isotopes would be flerovium-298, unbinilium-304 and unbihexium-310. Of particular note is 298Fl, which would be "doubly...