Ununennium (Uue)
Superactinideमानक परमाणु भार
उपलब्ध नहींइलेक्ट्रॉन विन्यास
[Og] 8s¹गलनांक
उपलब्ध नहींक्वथनांक
उपलब्ध नहींघनत्व
3 kg/m³ऑक्सीकरण अवस्थाएँ
++1, ++3विद्युतऋणात्मकता (पॉलिंग)
0.86आयनन ऊर्जा (प्रथम)
463.1 eVखोज का वर्ष
उपलब्ध नहींपरमाणु त्रिज्या
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.
चित्र
गुण
भौतिक
- परमाणु त्रिज्या (आनुभविक)
- 240 pm सभी तत्वों की परमाणु त्रिज्या (आनुभविक) की तुलना करें →
- सहसंयोजक त्रिज्या
- 272 pm सभी तत्वों की सहसंयोजक त्रिज्या की तुलना करें →
- घनत्व
- 3 kg/m³ सभी तत्वों की घनत्व की तुलना करें →
- क्रिस्टल संरचना
- अंतःकेंद्रित घनीय सभी तत्वों की क्रिस्टल संरचना की तुलना करें →
रासायनिक
- विद्युतऋणात्मकता (पॉलिंग)
- 0.86 सभी तत्वों की विद्युतऋणात्मकता (पॉलिंग) की तुलना करें →
- इलेक्ट्रॉन बंधुता
- 0.25 eV
- आयनन ऊर्जा (प्रथम)
- 463.1 eV सभी तत्वों की आयनन ऊर्जा (प्रथम) की तुलना करें →
- ऑक्सीकरण अवस्थाएँ
- ++1, ++3 सभी तत्वों की ऑक्सीकरण अवस्थाएँ की तुलना करें →
- इलेक्ट्रॉन विन्यास
- [Og] 8s¹
ऊष्मागतिक
उपलब्ध नहीं
नाभिकीय
- प्रोटॉन
- 119 सभी तत्वों की प्रोटॉन की तुलना करें →
- ज्ञात समस्थानिक
- 0 सभी तत्वों की ज्ञात समस्थानिक की तुलना करें →
- स्थिर समस्थानिक
- 0 सभी तत्वों की स्थिर समस्थानिक की तुलना करें →
- प्राकृतिक उपलब्धता
- प्रेक्षित नहीं
प्रचुरता
उपलब्ध नहीं
सुरक्षा
- रेडियोधर्मी
- हाँ
क्रिस्टल संरचना
उपलब्ध नहीं
इलेक्ट्रॉनिक संरचना
- प्रति कोश इलेक्ट्रॉन
- 2, 8, 18, 32, 32, 18, 8, 1 सभी तत्वों की प्रति कोश इलेक्ट्रॉन की तुलना करें →
पहचानकर्ता
- CAS संख्या
- 54846-86-5 सभी तत्वों की CAS संख्या की तुलना करें →
इलेक्ट्रॉन विन्यास पूर्वानुमानित
——इस आयन के लिए इलेक्ट्रॉन विन्यास का डेटा उपलब्ध नहीं है।
परमाणु मॉडल
समस्थानिक न्यूट्रॉन की संख्या, द्रव्यमान और स्थिरता बदलते हैं — उदासीन परमाणु का इलेक्ट्रॉन विन्यास नहीं।
उपलब्ध नहीं
सांकेतिक परमाणु मॉडल, वास्तविक अनुपात में नहीं।
परमाणु पहचान-चिह्न
उत्सर्जन / अवशोषण स्पेक्ट्रम
समस्थानिक वितरण
कोई स्थिर समस्थानिक नहीं है।
| द्रव्यमान संख्या | परमाणु द्रव्यमान (u) | प्राकृतिक प्रचुरता | अर्धायु |
|---|
प्रावस्था / अवस्था
प्रावस्था/अवस्था का डेटा उपलब्ध नहीं है
उपलब्ध नहीं
प्रावस्था/अवस्था का डेटा उपलब्ध नहीं है