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Nihonium, ₁₁₃Nh

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 ↓ — copernicium ← nihonium → flerovium
Atomic number (Z)	113
Group	group 13 (boron group)
Period	period 7
Block	p-block
Electron configuration	[Rn] 5f 6d 7s 7p (predicted)
Electrons per shell	2, 8, 18, 32, 32, 18, 3 (predicted)
Physical properties
Phase at STP	solid (predicted)
Melting point	700 K ​(430 °C, ​810 °F) (predicted)
Boiling point	1430 K ​(1130 °C, ​2070 °F) (predicted)
Density (near r.t.)	16 g/cm (predicted)
Heat of fusion	7.61 kJ/mol (extrapolated)
Heat of vaporisation	130 kJ/mol (predicted)
Atomic properties
Oxidation states	common: (none)
Ionisation energies	1st: 704.9 kJ/mol (predicted) 2nd: 2240 kJ/mol (predicted) 3rd: 3020 kJ/mol (predicted) (more)
Atomic radius	empirical: 170 pm (predicted)
Covalent radius	172–180 pm (extrapolated)
Other properties
Natural occurrence	synthetic
Crystal structure	​hexagonal close-packed (hcp) (predicted)
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 Decay Isotope abun­dance half-life (t1/2) mode pro­duct Nh synth 2.0 ms α Rg Nh synth 61 ms α Rg Nh synth 123 ms α Rg Nh synth 0.90 s α Rg ε Cn Nh synth 2.1 s α Rg SF – Nh synth 9.5 s α Rg Nh synth 5.5 s? α Rg Nh synth 2 s? α Rg
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