Nihonium

Nihonium, ₀₀Nh

Nihonium
Pronunciation	/nɪˈhoʊniəm/ ​(nih-HOH-nee-əm)
Mass number	[286]
Nihonium 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 Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson Tl ↑ Nh ↓ (Uhs) copernicium ← nihonium → flerovium
Group	group 13 (boron group)
Period	period 7
Block	p-block
Electron configuration	[Rn] 5f14 6d10 7s2 7p1 (predicted)[1] (predicted)
Electrons per shell	2, 8, 18, 32, 32, 18, 3 (predicted)
Physical properties
Phase at STP	solid (predicted)[1][2][3]
Melting point	700 K ​(430 °C, ​810 °F) (predicted)[1]
Boiling point	1430 K ​(1130 °C, ​2070 °F) (predicted)[1][4]
Density (near r.t.)	16 g/cm3 (predicted)[4]
Heat of fusion	7.61 kJ/mol (extrapolated)[3]
Heat of vaporization	130 kJ/mol (predicted)[2][4]
Atomic properties
Oxidation states	(−1), (+1), (+3), (+5) (predicted)[1][5][6]
Ionization energies	1st: 704.9 kJ/mol (predicted)[1] 2nd: 2240 kJ/mol (predicted)[4] 3rd: 3020 kJ/mol (predicted)[4] (more)
Atomic radius	empirical: 170 pm (predicted)[1]
Covalent radius	172–180 pm (extrapolated)[3]
Other properties
Natural occurrence	synthetic
Crystal structure	​hexagonal close-packed (hcp) (extrapolated)[7]
CAS Number	54084-70-7
History
Naming	After Japan (Nihon in Japanese)
Discovery	Riken (Japan, first undisputed claim 2004) JINR (Russia) and Livermore (US, first announcement 2003)
Isotopes of nihonium v e
Main isotopes[8] Decay abun­dance half-life (t1/2) mode pro­duct 278Nh synth 0.002 s α 274Rg 282Nh synth 0.061 s α 278Rg 283Nh synth 0.123 s α 279Rg 284Nh synth 0.90 s α 280Rg ε 284Cn 285Nh synth 2.1 s α 281Rg SF – 286Nh synth 9.5 s α 282Rg 287Nh synth 5.5 s?[9] α 283Rg 290Nh synth 2 s?[10] α 286Rg
Category: Nihonium view talk edit | references

Nihonium (ニホニウム) is a chemical element. It is also named eka-thallium. It has the symbol Nh. It has the atomic number 113. It is a transuranium element. The name "nihonium" comes from the name of Japan in Japanese, 日本 (nihon).

Nihonium does not exist in nature, and can only be made artificially. It is made from the alpha decay of moscovium.

There are no known uses for nihonium. What nihonium looks like is not known because not enough has been made to see it with human eyesight. Based on trends in the Periodic Table it could be a soft, silver colored, very reactive metal like sodium.

1. ↑ ^{1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7} Hoffman, 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.
2. ↑ ^{2.0 2.1} Seaborg, Glenn T. (c. 2006). "transuranium element (chemical element)". Encyclopædia Britannica. Retrieved 2010-03-16.
3. ↑ ^{3.0 3.1 3.2} Bonchev, Danail; Kamenska, Verginia (1981). "Predicting the Properties of the 113–120 Transactinide Elements". Journal of Physical Chemistry. 85 (9): 1177–1186. doi:10.1021/j150609a021.
4. ↑ ^{4.0 4.1 4.2 4.3 4.4} Fricke, Burkhard (1975). "Superheavy elements: a prediction of their chemical and physical properties". Recent Impact of Physics on Inorganic Chemistry. 21: 89–144. doi:10.1007/BFb0116498. Retrieved 4 October 2013.
5. ↑ Fricke, Burkhard (1975). "Superheavy elements: a prediction of their chemical and physical properties". Recent Impact of Physics on Inorganic Chemistry. Structure and Bonding. 21: 89–144. doi:10.1007/BFb0116498. ISBN 978-3-540-07109-9. Retrieved 4 October 2013.
6. ↑ Thayer, John S. (2010). "Relativistic Effects and the Chemistry of the Heavier Main Group Elements". In Barysz, Maria; Ishikawa, Yasuyuki (eds.). Relativistic Methods for Chemists. Challenges and Advances in Computational Chemistry and Physics. Vol. 10. Springer. pp. 63–67. doi:10.1007/978-1-4020-9975-5_2. ISBN 978-1-4020-9974-8.
7. ↑ Keller, O. L., Jr.; Burnett, J. L.; Carlson, T. A.; Nestor, C. W., Jr. (1969). "Predicted Properties of the Super Heavy Elements. I. Elements 113 and 114, Eka-Thallium and Eka-Lead". The Journal of Physical Chemistry. 74 (5): 1127−1134. doi:10.1021/j100700a029.{{cite journal}}: CS1 maint: multiple names: authors list (link)
8. ↑ Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.
9. ↑ ^{9.0 9.1} Hofmann, S.; Heinz, S.; Mann, R.; Maurer, J.; Münzenberg, G.; Antalic, S.; Barth, W.; et al. (2016). "Remarks on the Fission Barriers of SHN and Search for Element 120". In Peninozhkevich, Yu. E.; Sobolev, Yu. G. (eds.). Exotic Nuclei: EXON-2016 Proceedings of the International Symposium on Exotic Nuclei. Exotic Nuclei. pp. 155–164. ISBN 9789813226555. Cite error: Invalid <ref> tag; name "EXON" defined multiple times with different content
10. ↑ ^{10.0 10.1} Hofmann, S.; Heinz, S.; Mann, R.; Maurer, J.; Münzenberg, G.; Antalic, S.; Barth, W.; et al. (2016). "Review of even element super-heavy nuclei and search for element 120". The European Physics Journal A. 2016 (52). doi:10.1140/epja/i2016-16180-4. Cite error: Invalid <ref> tag; name "Hofmann2016" defined multiple times with different content