Unbinilium (Ubn)
Superactinide标准原子量
暂无电子排布
[Og] 8s²熔点
暂无沸点
暂无密度
暂无氧化态
++2, ++4电负性（鲍林）
暂无第一电离能
563.3 eV发现年份
暂无原子半径
暂无Unbinilium is the temporary systematic name for element 120, an undiscovered superheavy element. It is expected to lie below radium in group 2 and is often described as eka-radium, but all chemical and physical properties remain predicted. Relativistic effects should be large and may make its bonding and reactivity depart from simple alkaline-earth trends. No confirmed isotope, natural occurrence, or macroscopic sample is known.
This element has not been synthesized or experimentally confirmed. All listed physicochemical properties are calculated, extrapolated, or model-dependent.
The appearance of unbinilium is unknown because no atoms have been confirmed and no bulk sample exists. If a sufficiently long-lived bulk material could be made, it is predicted to be a metal, but its color, density, crystal structure, melting point, and other ordinary properties are unobserved.
Unbinilium has no confirmed commercial, industrial, medical, or technological use. Its only foreseeable use would be in basic nuclear and chemical research, especially studies of superheavy-element synthesis, decay chains, nuclear shell effects, and relativistic chemistry. Any experiments would involve single atoms or very small numbers of atoms, not usable quantities of material.
No compound of unbinilium has been made or observed. Calculations generally predict a dominant +2 oxidation state, analogous to heavier alkaline-earth chemistry, with possible species such as unbinilium fluoride (UbnF₂), unbinilium chloride (UbnCl₂), unbinilium oxide (UbnO), and unbinilium hydride (UbnH₂). The stability, volatility, and bonding of these compounds are uncertain because relativistic effects and nuclear lifetimes would strongly constrain experiments.
The safety properties of unbinilium are not experimentally known. Any isotope, if synthesized, is expected to be radioactive and short-lived, so the principal hazard would be ionizing radiation from decay products rather than ordinary chemical exposure. The quantities involved in research would be atom-at-a-time, but accelerator targets and reaction products would require radiological controls.
No confirmed natural occurrence of unbinilium is known, and environmental behavior has not been observed. Predicted isotopes would decay far too quickly to participate in ordinary geochemical or biological cycles. If atoms were produced in a laboratory, they would remain confined to experimental apparatus and decay into lighter nuclei.
Unbinilium has no commodity market, no practical supply chain, and no recoverable source. Production, if achieved, would require heavy-ion fusion in specialized accelerators using rare actinide targets and intense projectile beams, with expected yields of at most a few atoms. Candidate reactions have involved combinations such as titanium or chromium ions with californium, curium, or plutonium targets, but no confirmed synthesis has established an isotope. Costs are therefore research-program costs, not material prices.
Unbinilium has not been detected in Earth materials or extraterrestrial samples. Very heavy nuclei may be formed transiently in extreme neutron-rich astrophysical events, but element 120 has no confirmed cosmic abundance. Predicted islands of enhanced nuclear stability are a motivation for searches, not evidence for natural persistence.
- Unbinilium is still named by the IUPAC temporary systematic naming convention.
- Element 120 would begin the eighth period in many extended periodic-table layouts.
- Its expected chemistry is influenced by the relativistic stabilization of the 8s electrons.
- A successful synthesis would probably be identified through correlated radioactive decay chains, not by weighing or isol
图片
性质
物理性质
暂无
化学性质
- 电子亲和能
- 0.02 eV
- 第一电离能
- 563.3 eV 比较所有元素的第一电离能 →
- 氧化态
- ++2, ++4 比较所有元素的氧化态 →
- 电子排布
- [Og] 8s²
热力学性质
暂无
核性质
- 质子
- 120 比较所有元素的质子 →
- 已知同位素
- 0 比较所有元素的已知同位素 →
- 稳定同位素
- 0 比较所有元素的稳定同位素 →
- 天然存在形式
- 未观测到
丰度
暂无
安全
- 放射性
- 是
晶体结构
暂无
电子结构
- 各电子层电子数
- 2, 8, 18, 32, 32, 18, 8, 2 比较所有元素的各电子层电子数 →
标识符
- CAS登记号
- 54143-58-7 比较所有元素的CAS登记号 →
电子排布 预测值
——暂无该离子的电子排布数据。
原子模型
不同同位素的中子数、质量和稳定性不同，但中性原子的电子排布不变。
暂无
原子模型示意图，未按比例绘制。
原子指纹
发射 / 吸收光谱
同位素分布
无稳定同位素。
| 质量数 | 原子质量（u） | 天然丰度 | 半衰期 |
|---|
物相 / 状态
暂无物相/状态数据
暂无
暂无物相/状态数据