Ununennium (Uue)
SuperactinidePeso atómico estándar
N/DConfiguración electrónica
[Og] 8s¹Punto de fusión
N/DPunto de ebullición
N/DDensidad
3 kg/m³Estados de oxidación
++1, ++3Electronegatividad (Pauling)
0,86Energía de ionización (1.ª)
463,1 eVAño de descubrimiento
N/DRadio atómico
240 pmUnunennium is the temporary IUPAC name for element 119, an undiscovered superheavy element placed below francium in group 1. All of its properties are predicted. It is expected to have an outer 8s electron and broadly alkali-metal-like chemistry, but strong relativistic effects may make it less simple than a direct extrapolation from cesium or francium. No isotope has been confirmed.
This element has not been synthesized or experimentally confirmed. All listed physicochemical properties are calculated, extrapolated, or model-dependent.
No macroscopic sample of ununennium exists, so its appearance is unknown. It is usually predicted to be a metallic solid under ordinary conditions, but color, luster, density, melting point, and other bulk properties have not been measured.
Ununennium has no confirmed practical, industrial, medical, or commercial use. If produced, it would be made atom by atom for nuclear and chemical research, chiefly to test models of superheavy nuclei, decay chains, and relativistic effects in the heaviest group 1 element. Any chemical study would probably involve single atoms or very small numbers of atoms and short observation times.
No compound of ununennium has been synthesized or characterized. Calculations predict that the +1 oxidation state and the Uue⁺ ion would be the most accessible, as in lighter alkali metals. Representative species considered in theoretical work include ununennium fluoride (UueF), ununennium chloride (UueCl), and ununennium hydroxide (UueOH). Relativistic stabilization of the 8s electron may alter bond strengths and volatility relative to simple periodic trends.
The safety properties of ununennium are not experimentally known. Any atoms produced would be radioactive, and isotope-specific half-lives and decay modes would control the hazard. In practice, risks would arise mainly from accelerator operation, radioactive targets, recoil products, and decay radiation, not from chemical toxicity of a bulk element. No ordinary exposure scenario exists.
Ununennium has no confirmed natural occurrence and no known environmental cycle. Because no isotope has been observed, its environmental mobility, speciation, and ecological effects are unmeasured. If atoms were produced in a laboratory, their quantities would be far too small for environmental behavior to be studied directly, and rapid radioactive decay is expected to dominate their fate.
Ununennium has no commodity market, commercial supply chain, or recoverable source. Production, if achieved, would require a heavy-ion accelerator, an intense beam, and a rare heavy actinide target, followed by atom-at-a-time detection. The limiting factors are target availability, beam time, very low reaction probabilities, and short-lived products. Economic discussion is therefore about research capability rather than demand, substitution, or recycling.
No confirmed ununennium has been detected on Earth or in extraterrestrial material. Superheavy nuclei near this region may be formed transiently in extreme nucleosynthesis environments, but any such atoms are expected to decay rapidly unless an unusually long-lived isotope exists. The proposed island of stability remains a theoretical motivation for searches.
- Ununennium is a systematic temporary name meaning one-one-nine.
- It would begin the eighth period of the periodic table if confirmed.
- No isotope of ununennium has yet been accepted as discovered.
- Its chemistry is inferred from theory and periodic trends, not experiments.
- Detection would rely on nuclear decay signatures rather than a visible sample.
- Relativistic effects are expected to be important for its 8s electron.
Imágenes
Propiedades
Físicas
- Radio atómico (empírico)
- 240 pm Comparar Radio atómico (empírico) de todos los elementos →
- Radio covalente
- 272 pm Comparar Radio covalente de todos los elementos →
- Densidad
- 3 kg/m³ Comparar Densidad de todos los elementos →
- Estructura cristalina
- Cúbica centrada en el cuerpo Comparar Estructura cristalina de todos los elementos →
Químicas
- Electronegatividad (Pauling)
- 0,86 Comparar Electronegatividad (Pauling) de todos los elementos →
- Afinidad electrónica
- 0,25 eV
- Energía de ionización (1.ª)
- 463,1 eV Comparar Energía de ionización (1.ª) de todos los elementos →
- Estados de oxidación
- ++1, ++3 Comparar Estados de oxidación de todos los elementos →
- Configuración electrónica
- [Og] 8s¹
Termodinámicas
N/D
Nucleares
- Protones
- 119 Comparar Protones de todos los elementos →
- Isótopos conocidos
- 0 Comparar Isótopos conocidos de todos los elementos →
- Isótopos estables
- 0 Comparar Isótopos estables de todos los elementos →
- Presencia en la naturaleza
- No observado
Abundancia
N/D
Seguridad
- Radiactivo
- Sí
Estructura cristalina
N/D
Estructura electrónica
- Electrones por capa
- 2, 8, 18, 32, 32, 18, 8, 1 Comparar Electrones por capa de todos los elementos →
Identificadores
- Número CAS
- 54846-86-5 Comparar Número CAS de todos los elementos →
Configuración electrónica Predicho
——No hay datos disponibles sobre la configuración electrónica de este ion.
Modelo atómico
Los isótopos cambian el número de neutrones, la masa y la estabilidad, pero no la configuración electrónica de un átomo neutro.
N/D
Modelo atómico esquemático, no a escala.
Huella atómica
Espectro de emisión / absorción
Distribución isotópica
No hay isótopos estables.
| Número másico | Masa atómica (u) | Abundancia natural | Periodo de semidesintegración |
|---|
Fase / Estado
No hay datos disponibles sobre la fase o el estado
N/D
No hay datos disponibles sobre la fase o el estado