Nihonium

Chaitra 26/06/2026 19:58:09 Updated 26/06/2026 19:58:09

Property	Value
Atomic Number	113
Element	Nihonium
Symbol	Nh
Atomic Mass	[286] (most stable isotope)
Number of Neutrons	173 (Nihonium-286)
Number of Protons	113
Number of Electrons	113
Period	7
Group	13
Phase	Solid (predicted)
Radioactive	Yes
Natural	No (synthetic element)
Metal	Yes (predicted)
Nonmetal	No
Metalloid	No
Type	Post-transition Metal
Atomic Radius	— (not well established)
Electronegativity	— (not well established)
First Ionization Energy	~7.3 eV (estimated)
Density	~16 g/cm³ (estimated)
Melting Point	~430 °C (estimated)
Boiling Point	~1100 °C (estimated)
Number of Isotopes	No stable isotopes (Nh-286 most notable)
Discoverer	RIKEN (Japan)
Year	2004
Specific Heat	— (not well established)
Number of Shells	7
Number of Valence Electrons	3