113 · Nh
Nihonium
A 2003 Dubna–Livermore claim does not carry priority. RIKEN produces the element in 2004. The name nihonium in 2016.
Identity
- Atomic number
- 113
- Symbol
- Nh
- Canonical name
- Nihonium
- Category
- classification unsettled
- Group
- 13
- Period
- 7
- Block
- p
Bulk chemistry is not established. The table column is not a confirmed family.
Properties
These quantities come from the Periodic Table JSON compilation. They have not yet been checked, one by one, against CIAAW atomic weights or NIST measurements. A value marked estimated is not a measurement.
- Atomic mass
- [286] No standard atomic weight. The number shown is the conventional mass number used in tables, not a measured mass in u.
- Electron configuration
- *[Rn] 5f14 6d10 7s2 7p1
- Electrons per shell
- 2, 8, 18, 32, 32, 18, 3
- Standard state
- not established
- Density
- 16 g/cm³ (estimated) Predicted value: the element has not been observed in bulk.
- Melting point
- 700 K (estimated) Predicted value: the element has not been observed in bulk.
- Boiling point
- 1,430 K (estimated) Predicted value: the element has not been observed in bulk.
Notable isotopes
This summary is not an inventory of every isotope.
Conventional mass number: 286
History
Dubna–Livermore claim
Synthesis · claimed · 2003
A decay chain seen in the calcium-48 experiments is offered as evidence for element 113. The priority later upheld is not this one.
Nihonium at RIKEN
Synthesis · confirmed · 2004
Morita’s team produces element 113 at Wako. This is the synthesis whose priority is upheld.
- Reaction
- 209Bi(70Zn,n)278Nh
- Target
- 209Bi
- Projectile
- 70Zn
- Isotope produced
- 278Nh
The name nihonium
Official recognition · officially recognized · 2016
IUPAC adopts the name nihonium in 2016, after crediting RIKEN.
Etymology
- Theme
- country
- Language
- japonais
- Root
- Nihon
- Meaning
- Japan, Nihon
- Temporary systematic name
- ununtrium (Uut)
- Official adoption
- 2016
Scientists
Places and institutions
- Dubna — historical setting : Soviet Union — present country : Russia
- Wako — historical setting : Japan — present country : Japan
See also
Sources
- IUPAC, Periodic Table of the Elements
- Bowserinator, Periodic Table JSON. Compilation secondaire d’où viennent les grandeurs physiques importées (masse, densité, températures, énergies). Elles ne sont pas revérifiées une à une auprès du NIST ou de la CIAAW.
- IUPAC, décisions sur la priorité et les noms des éléments transfermiens (1997–2016)