Transition metal, atomic number 113.
Nihonium is a chemical element with atomic number 113. It has a symbol Nh. It is a synthetic element (an element that can be created in a laboratory but is not found in nature) and is extremely radioactive; its most stable known isotope, nihonium-286, has a half-life of 20 seconds.
Symbol Nh. Atomic mass 286.0 u. Group 13, period 7. Electron configuration [Rn] 5f14 6d10 7s2 7p1. Electrons per shell 2, 8, 18, 32, 32, 18, 3. State at room temperature: Solid. Melting point 426.9 °C, boiling point 1156.8 °C. Discovered by RIKEN.
Element data from Wikipedia, CC BY-SA 3.0.