Unbinilium (Ubn)
SuperactinideStandard Atomic Weight
N/AElectron configuration
[Og] 8s²Melting point
N/ABoiling point
N/ADensity
N/AOxidation states
++2, ++4Electronegativity (Pauling)
N/AIonization energy (1st)
Discovery year
N/AAtomic radius
N/AUnbinilium 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.
Images
Properties
Physical
N/A
Chemical
- Electron affinity
- Ionization energy (1st)
- Oxidation states
- ++2, ++4
- Electron configuration
Thermodynamic
N/A
Nuclear
- Protons
- 120
- Known isotopes
- 0
- Stable isotopes
- 0
- Natural occurrence
- not_observed
Abundance
N/A
Safety
- Radioactive
- Yes
Crystal Structure
N/A
Electronic Structure
- Electrons per shell
- 2, 8, 18, 32, 32, 18, 8, 2
Identifiers
- CAS number
- 54143-58-7
Electron Configuration Predicted
——Electron configuration data not available for this ion.
Atomic model
Isotopes change neutron count, mass, and stability — not the electron configuration of a neutral atom.
N/A
Schematic atomic model, not to scale.
Atomic Fingerprint
Emission / Absorption Spectrum
Isotope Distribution
No stable isotopes.
| Mass number | Atomic mass (u) | Natural abundance | Half-life |
|---|
Phase / State
Phase/state data not available
N/A
Phase/state data not available