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Chemical, physical and material properties and data of the chemical element Moscovium.



Moscovium - element symbol Mc -is the international name approved by IUPAC in November 2016 for the chemical element 115, which until then had been given the provisional systematic designation Ununpentium (Uup). After a five-month public review period that ended on November 8, 2016, the proposed name was officially endorsed by the IUPAC Council.

The name suggestion came from the discoverers of the element with atomic number 115 at the Joint Institute for Nuclear Research (JINR) in Dubna near Moscow.

The namesakes chose the element name Moscovium in recognition of the Moscow region and in honor of historic Russia, home of the Joint Institute for Nuclear Research where the experiments leading up to the discovery were conducted.

The artificial, unstable, radioactive, superheavy chemical element moscovium was first created in 2004; these first indications of the element were confirmed by a research team in 2013.

It was made by bombarding americium isotopes 243Am with calcium nuclei 48Ca.

Employment and research on this element is for academic purposes only - there are no technical or other practical applications.


General Information about Moscovium

Regular nameMoscoviumChemical symbolMcOther namesElement 115Systematic nameUnunpentium, Uup (until June 2016, now obsolete)Historical namesEka-Bismuth, Eka-BiName meaning, originCity and region of Moscow, RussiaDiscovery (year)(2004)OccurenceOnly artificially producible chemical element with no practical meaning.Position in the PSEGroup 15 (main group Va), period 7, p-blockGroup membershipNitrogen group, pnictogens, pentels, transactinides, superheavy elements, metals


Atomar Properties of Moscovium

Atomic number Z115 = number of protonsStandard Atomic Weight288.19274 (62)


Electron configuration of Moscovium

Due to its position in the periodic table, moscovium probably has 5 valence electrons: 7s2 7p3. The electron configuration is:


Abbreviated form: [Rn] 5f14 6d10 7s2 7p3.


Ionization Energies of Moscovium

The following table lists the ionization energies IE (ionization potentials); the IE is the energy required in electron volts (eV) per atom to separate a given electron from an Moscovium atom.



Isotopic Data of Moscovium

An overview of the nuclides as well as the isotopic data and properties are listed on the following page: Moscovium isotopes.


Chemistry of Moscovium


Valence electrons5Oxidation states+ 3. + 1Electron affinity0.366 eV
35.3 kJ mol-1


Material and Physical Properties


External Data, Identifiers

CAS registry number54085-64-2InChI =1S/McInChIKeyQDXZEHQJHSHEQF-UHFFFAOYSA-N


Literature Sources and References

[1] - Yu. Ts. Oganessian et al.:
Experiments on the synthesis of element 115 in the reaction 243Am(48Ca,xn)291āˆ’x115.
In: Physical Review C, (2004), DOI 10.1103/PhysRevC.69.021601.

[2] - Yu. Ts. Oganessian et al.:
Synthesis of elements 115 and 113 in the reaction 243Am+48Ca.
In: Physical Review C, (2005), DOI 10.1103/PhysRevC.72.034611.

[3] - D. Rudolph et al.:
Spectroscopy of Element 115 Decay Chains.
In: Physical Review Letters, (2013), DOI 10.1103/PhysRevLett.111.112502.

[4] - J. M. Gates et al.:
Decay spectroscopy of element 115 daughters: 280Rg → 276Mt and 276Mt → 272Bh.
In: Physical Review C, (2015), DOI 10.1103/PhysRevC.92.021301.

[5] - Paul J. Karol, Robert C. Barber, Bradley M. Sherrill, Emanuele Vardaci, Toshimitsu Yamazaki:
Discovery of the elements with atomic numbers Zā€‰=ā€‰113, 115 and 117.
In: Pure and Applied Chemistry, (2016), DOI 10.1515/pac-2015-0502.

[6] - Yuri Oganessian:
The making of moscovium.
In: Nature Chemistry, (2018), DOI 10.1038/s41557-018-0185-6.


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Last update: 2022-12-18

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