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Nihonium,  113Nh
General properties
Pronunciation/nɪˈhniəm/ (ni-HOH-nee-əm)
Mass number286 (most stable isotope)
Nihonium in the periodic table
HydrogenHelium
LithiumBerylliumBoronCarbonNitrogenOxygenFluorineNeon
SodiumMagnesiumAluminiumSiliconPhosphorusSulfurChlorineArgon
PotassiumCalciumScandiumTitaniumVanadiumChromiumManganeseIronCobaltNickelCopperZincGalliumGermaniumArsenicSeleniumBromineKrypton
RubidiumStrontiumYttriumZirconiumNiobiumMolybdenumTechnetiumRutheniumRhodiumPalladiumSilverCadmiumIndiumTinAntimonyTelluriumIodineXenon
CaesiumBariumLanthanumCeriumPraseodymiumNeodymiumPromethiumSamariumEuropiumGadoliniumTerbiumDysprosiumHolmiumErbiumThuliumYtterbiumLutetiumHafniumTantalumTungstenRheniumOsmiumIridiumPlatinumGoldMercury (element)ThalliumLeadBismuthPoloniumAstatineRadon
FranciumRadiumActiniumThoriumProtactiniumUraniumNeptuniumPlutoniumAmericiumCuriumBerkeliumCaliforniumEinsteiniumFermiumMendeleviumNobeliumLawrenciumRutherfordiumDubniumSeaborgiumBohriumHassiumMeitneriumDarmstadtiumRoentgeniumCoperniciumNihoniumFleroviumMoscoviumLivermoriumTennessineOganesson
Tl

Nh

(Uhs)
coperniciumnihoniumflerovium
Atomic number (Z)113
Groupgroup 13 (boron group)
Periodperiod 7
Blockp-block
Element category  unknown chemical properties, but probably a post-transition metal
Electron configuration[Rn] 5f14 6d10 7s2 7p1 (predicted)
Electrons per shell
2, 8, 18, 32, 32, 18, 3 (predicted)
Physical properties
Phase at STPNh: Unknown phase (predicted)
Melting point700 K ​(430 °C, ​810 °F) (predicted)
Boiling point1430 K ​(1130 °C, ​2070 °F) (predicted)
Density (near r.t.)16 g/cm3 (predicted)
Heat of fusion7.61 kJ/mol (extrapolated)
Heat of vaporization130 kJ/mol (predicted)
Atomic properties
Oxidation states(−1), (+1), (+3), (+5) (predicted)
Ionization energies
  • 1st: 704.9 kJ/mol (predicted)
  • 2nd: 2240 kJ/mol (predicted)
  • 3rd: 3020 kJ/mol (predicted)
  • (more)
Atomic radiusempirical: 170 pm (predicted)
Covalent radius172–180 pm (extrapolated)
Other properties
Natural occurrenceNh: Synthetic
Crystal structurehexagonal close-packed (hcp)
Hexagonal close-packed crystal structure for nihonium

(extrapolated)
CAS Number54084-70-7
History
NamingAfter Japan (Nihon in Japanese)
DiscoveryRiken (Japan, first undisputed claim 2004)
JINR (Russia) and Livermore (US, first announcement 2003)
Main isotopes of nihonium
Iso­topeAbun­danceHalf-life (1/2)Decay modePro­duct
278Nhsyn1.4 msα274Rg
282Nhsyn73 msα278Rg
283Nhsyn75 msα279Rg
284Nhsyn0.91 sα280Rg
EC284Cn
285Nhsyn4.2 sα281Rg
286Nhsyn9.5 sα282Rg
287Nhsyn5.5 s?α283Rg
290Nhsyn2 s?α286Rg
| 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.

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THE ELEMENTS - with new elements nihonium, moscovium, tennessine and oganesson!

THE ELEMENTS - with new elements nihonium, moscovium, tennessine and oganesson!
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