Copernicium (formerly Ununbium) is a chemical element in the Periodic Table. It is also named eka-mercury. It has the symbol Cn. It has the atomic number 112. It is a transuranium element.
Quick Facts Pronunciation, Mass number ...
Copernicium, 00Cn|
Pronunciation | (KOH-pər-NISS-ee-əm) |
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Mass number | [285] |
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Group | group 12 |
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Period | period 7 |
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Block | d-block |
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Electron configuration | [Rn] 5f14 6d10 7s2 (predicted)[1] (predicted) |
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Electrons per shell | 2, 8, 18, 32, 32, 18, 2 (predicted) |
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Phase at STP | gas (predicted) |
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Boiling point | 357+112 −108 K (84+112 −108 °C, 183+202 −194 °F)[2] |
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Density when liquid (at m.p.) | 23.7 g/cm3 (predicted)[1] |
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Oxidation states | 0, (+1), +2, (+4), (+6) (parenthesized: prediction)[1][3][4][5] |
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Ionization energies | - 1st: 1155 kJ/mol
- 2nd: 2170 kJ/mol
- 3rd: 3160 kJ/mol
- (more) (all estimated)[1]
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Atomic radius | calculated: 147 pm[1][6] (predicted) |
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Covalent radius | 122 pm (predicted)[7] |
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Natural occurrence | synthetic |
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Crystal structure | body-centered cubic (bcc) (predicted)[8] |
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CAS Number | 54084-26-3 |
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Naming | after Nicolaus Copernicus |
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Discovery | Gesellschaft für Schwerionenforschung (1996) |
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Category: Copernicium | references |
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The element is named in honor of Nicolaus Copernicus.
Using periodic trends, people think that it will be a liquid metal. It is likely to be more volatile than mercury.