Moscovium

This article describes the chemical element with the ordinal number 115. With the different spelling Moskowium , Oganesson , the element with the ordinal number 118, was previously referred to in isolated cases before the official name was given. For the geological age, however, see Moskovium .

properties
[ Rn ] 5 f 14 6 d 10 7 s 2 7 p 3 115 Mc Periodic table
General
Name , symbol , atomic number	Moscovium, Mc, 115
Element category
Group , period , block	15 , 7 , p
CAS number	54085-64-2
Atomic
Atomic mass	(Estimate) 288 u
Electron configuration	[ Rn ] 5 f 14 6 d 10 7 s 2 7 p 3
1. Ionization energy	538 kJ / mol
Physically
Isotopes
isotope NH t 1/2 ZA ZE (M eV ) ZP 287 Mc {syn.} 68 ms α 10.6 283 Nh 288 Mc {syn.} 170 ms α 11.4 284 Nh 289 Mc {syn.} 320 ms α 10.6 285 Nh 290 Mc {syn.} 23 ms α 10.3 286 Nh 291 Mc {syn.} ? α 10.0 287 Nh
For other isotopes see list of isotopes
Hazard and safety information
Radioactive
GHS hazard labeling no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Moscovium is an artificially created chemical element with the element symbol Mc and the atomic number 115. In the periodic table it is in the 15th  IUPAC group and thus belongs to the nitrogen group .

History and synthesis

On February 1, 2004, in a publication in Physical Review C , the synthesis was reported by a working group of Russian scientists from Dubna and US scientists from the Lawrence Livermore National Laboratory . The experiment is said to have produced four atoms and disintegrated into nihonium within a split second .

On January 31, 2006 it was announced that Swiss researchers were able to produce 15 moscovium atoms using a refined method by bombarding a disk made of americium with calcium atoms. They identified these by their decay product Dubnium . The decay series also includes the element Nihonium, so that this could also be detected.

On August 27, 2013, researchers from Lund University announced that they had also observed element 115 at the GSI Helmholtz Center for Heavy Ion Research . As in the Swiss group, americium was bombarded with calcium.

Naming

After the discovery, the element was initially given the systematic name Ununpentium (chemical symbol Uup ), a formation from the Latin unum for 'one' and ancient Greek πέντε, pénte for 'five', corresponding to the ordinal number 115. It was also referred to as Eka bismuth , composed of Sanskrit एक eka for 'one' and bismuth , with reference to its classification in the periodic table, 'one place below bismuth'. On December 30, 2015, the discovery of the element was officially recognized by the IUPAC and the working group of the United Institute for Nuclear Research Dubna, Russia, the Lawrence Livermore National Laboratory, California, and the Oak Ridge National Laboratory , Oak Ridge, Tennessee the right to be named awarded. On June 8, 2016, the IUPAC announced that the name Moscovium (Mc) had been proposed for the element ; the objection period ended on November 8, 2016. This name was previously used in the media for the element 118 Oganesson , for which the name was reported to be originally proposed. The final naming was published on November 30, 2016.

safety instructions

There is no classification according to the CLP regulation or other regulations, because only a few atoms of this element can be produced at the same time and thus far too few for chemical or physical hazard.

Web links

Commons : Moscovium  - collection of images, videos and audio files

Wiktionary: Moscovium  - explanations of meanings, word origins, synonyms, translations

• Nuclide map at the National Nuclear Data Center

Individual evidence

1. ↑ Entry on moscovium at WebElements, https://www.webelements.com , accessed on June 13, 2020.
2. ↑ ^{a b c} Dirk Rudolph et al .: Spectroscopy of Element 115 Decay Chains . In: Physical Review Letters . tape 111 , no. 11 , September 2013, p. 112502 , doi : 10.1103 / PhysRevLett.111.112502 (English, freely available online through researchgate.net ).
3. ↑ The hazards emanating from radioactivity do not belong to the properties to be classified according to the GHS labeling. With regard to other hazards, this element has either not yet been classified or a reliable and citable source has not yet been found.
4. ↑ Yuri Ts. Oganessian , VK Utyonkoy, Yu. V. Lobanov, F. Sh. Abdullin, AN Polyakov, IV Shirokovsky, Yu. S. Tsyganov, GG Gulbekian, SL Bogomolov, AN Mezentsev, S. Iliev, VG Subbotin, AM Sukhov, AA Voinov, GV Buklanov, K. Subotic, VI Zagrebaev, MG Itkis, JB Patin, KJ Moody, JF Wild, MA Stoyer , NJ Stoyer, DA Shaughnessy, JM Kenneally, RW Lougheed: Experiments on the synthesis of element 115 in the reaction ²⁴³ Am ( ⁴⁸ Ca, xn ) ^{291– x} 115 . In: Physical Review C . tape 69 , no. 2 , February 2004, p. 021601 , doi : 10.1103 / PhysRevC.69.021601 (English, freely available online through fls2.jinr.ru [PDF; 73 kB ]).
5. ↑ Beat Gerber: Two super-heavy elements discovered. Press release from the Paul Scherrer Institute . In: idw-online.de. Science Information Service , January 31, 2006, accessed on August 15, 2018 . 
6. ↑ Existence of new element confirmed. Announcement from Lund University . August 27, 2013, accessed August 15, 2018 . 
7. ^ Discovery and Assignment of Elements with Atomic Numbers 113, 115, 117 and 118. In: IUPAC | International Union of Pure and Applied Chemistry . December 30, 2015, accessed August 15, 2018 . 
8. ↑ IUPAC is naming the four new elements nihonium, Moscovian, antenna sine, and oganesson. In: IUPAC | International Union of Pure and Applied Chemistry . June 8, 2016, accessed August 15, 2018 . 
9. ^ IUPAC Announces the Names of the Elements 113, 115, 117, and 118. In: IUPAC | International Union of Pure and Applied Chemistry . November 30, 2016, accessed August 15, 2018 .