Nihonium
unknown, probably transition metal · period 7 · group 13 · p-block
Nihonium is a synthetic chemical element with the symbol Nh and atomic number 113. It is extremely radioactive; its most stable known isotope, nihonium-286, has a half_life of about 10 seconds.
What the numbers say
At standard temperature and pressure Nihonium is a solid, sitting in period 7, group 13 of the p-block.
Its melting point of 700 K (427 °C) is the 74th highest of the 110 elements with a measured value — mid-range among the elements.
First identified in 2004.
Check it against computed structures
The structure search queries the Materials Project, OQMD and the Open Materials Database for computed crystal structures containing Nh — with DFT formation energy, hull stability and band gap where the provider publishes them.
K 2 · L 8 · M 18 · N 32 · O 32 · P 18 · Q 3
Properties
| Atomic number | 113 |
|---|---|
| Atomic mass | 286 u |
| Series | unknown, probably transition metal |
| Group | 13 |
| Period | 7 |
| Block | p-block |
| Phase at STP | Solid |
| Melting point | 700 K (427 °C) |
| Boiling point | 1430 K (1157 °C) |
| Electron configuration | *[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p¹ |
| Discovered | 2004 |
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See Nh in context with all 118 elements.
Working with nihonium in a real design?
Ask the materials chat how Nh behaves in your alloy system, what it does to weldability, and which grades to look at — with the source of every number named.