Nihonium (Nh) – element 113
Nihonium is a chemical element with the symbol Nh and atomic number 113. It is a unknown (probably transition metal) in group 13, period 7 of the periodic table (p-block), and is a solid at room temperature.
Nihonium (Nh) has atomic number 113, atomic mass [286] and electron configuration *[Rn] 5f14 6d10 7s2 7p1.
Nihonium facts
| Symbol | Nh |
|---|---|
| Atomic number | 113 |
| Atomic mass | [286] |
| Category | unknown (probably transition metal) |
| Group | group 13 |
| Period | 7 |
| Block | p-block |
| Phase at 20 °C | Solid |
| Electron configuration | 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d10 7p1 |
| Noble-gas notation | *[Rn] 5f14 6d10 7s2 7p1 |
| Electrons per shell | 2, 8, 18, 32, 32, 18, 3 |
| Valence electrons | 3 |
Bohr model and shells
Nihonium has 113 electrons in 7 shells: 2, 8, 18, 32, 32, 18, 3. Full configuration and noble-gas notation are in the table; work out any element or ion with the electron configuration calculator.
Physical and atomic properties
| Melting point | 700 K (426.9 °C) |
|---|---|
| Boiling point | 1430 K (1156.8 °C) |
| Density | 16 g/cm³ |
| Electron affinity | 66.6 kJ/mol |
| Discovered by | RIKEN |
Use the atomic mass in the molar mass calculator for any formula containing Nh.
Position in the periodic table
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Frequently asked questions
What is the atomic mass of nihonium?
The atomic mass of nihonium is [286] (mass number of its longest-lived isotope, since it has no stable isotope).
What is the electron configuration of nihonium?
Nihonium has 113 electrons: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹⁴ 6d¹⁰ 7p¹, or *[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p¹ in noble-gas notation. Electrons per shell: 2, 8, 18, 32, 32, 18, 3.
How many valence electrons does nihonium have?
Nihonium has 3 valence electrons (group 13).
Is nihonium a metal?
Yes. Nihonium is a unknown (probably transition metal).
Where is nihonium on the periodic table?
Nihonium is in group 13, period 7, in the p-block.
Data: Periodic-Table-JSON (CC BY-SA 3.0); standard atomic weights from IUPAC (abridged). Values in brackets are the mass number of the longest-lived isotope.