Ununseptium
Ununseptium General
| Name:Ununseptium | Symbol:Uus |
| Type:Halogen | Atomic weight:294 |
| Density @ 293 K:g/cm3 | Atomic volume:cm3/mol |
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Discovered:
Ununseptium was first made by research scientists at the Joint Institute for Nuclear Research in Dubna, Russia in 2010. Scientists reacted calcium with berkelium ions. Ununseptium (Uus) is a temporary element name until it is given an official name by The International Union of Pure and Applied Chemistry (IUPAC). As a result of its position in the periodic table ununseptium is expected to be classed as one of the halogens. The effects of relativistic electrons may result in partial metalloid properties. Too little of the element has been synthesized for the chemical properties to be confirmed. |
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Ununseptium States
| State (s, l, g):unknown | |
| Melting point:K ( °C) | Boiling point:K ( °C) |
Ununseptium Energies
| Specific heat capacity: J g-1 K-1 | Heat of atomization:kJ mol-1 |
| Heat of fusion:kJ mol-1 | Heat of vaporization :kJ mol-1 |
| 1st ionization energy:kJ mol-1 | 2nd ionization energy:kJ mol-1 |
| 3rd ionization energy:kJ mol-1 | Electron affinity:kJ mol-1 |
Ununseptium Oxidation & Electrons
| Shells:2, 8, 18, 32, 32, 18, 7 | Electron configuration:[Rn] 5f14 6d10 7s2 7p5 (presumed) |
| Minimum oxidation number: | Maximum oxidation number: |
| Min. common oxidation no.: | Max. common oxidation no.: |
| Electronegativity (Pauling Scale): | Polarizability volume:Å3 |
Ununseptium Appearance & Characteristics
| Structure: | Color: |
| Hardness:mohs | |
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Harmful effects:
Ununseptium is harmful due to its radioactivity. |
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Characteristics:
Ununseptium is a synthetic radioactive metal and has only been produced in minute amounts. Uses: Ununseptium is of research interest only. |
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Ununseptium Reactions
| Reaction with air: | Reaction with 6 M HCl: |
| Reaction with 15 M HNO3: | Reaction with 6 M NaOH: |
Ununseptium Compounds
| Oxide(s): | Chloride(s): |
| Hydride(s): |
Ununseptium Radius
| Atomic radius:pm | Ionic radius (1+ ion):pm |
| Ionic radius (2+ ion):pm | Ionic radius (3+ ion):pm |
| Ionic radius (2- ion):pm | Ionic radius (1- ion):pm |
Ununseptium Conductivity
| Thermal conductivity:W m-1 K-1 | Electrical conductivity:x 106 S cm-1 |
Ununseptium Abundance & Isotopes
| Abundance earth's crust: nil | |
| Abundance solar system:parts per billion by weight, part per billion by moles | |
| Cost, pure:$ per 100g | |
| Cost, bulk:$ per 100g | |
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Source:
Ununseptium is a synthetic radioactive metal, created via nuclear bombardment, and has only been produced in minute amounts. Ununseptium is produced by reacting 249Bk with 48Ca . |
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Isotopes:
Ununseptium has 2 isotopes whose half-lives are known, with mass numbers 293 and 294. Neither are stable. The most stable isotope is 294Uus, with a half-life of 78 milliseconds. |
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Ununseptium Other
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Other:
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