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Pronunciation | (KOH-pər-NIS-ee-əm) |
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Mass number | 285 (most stable isotope) |
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Atomic number (Z) | 112 |
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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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Element category | post-transition metal, alternatively considered a transition metal |
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Electron configuration | [Rn] 5f14 6d10 7s2 (predicted) |
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Electrons per shell | 2, 8, 18, 32, 32, 18, 2 (predicted) |
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Phase at STP | Cn: Unknown phase (predicted) |
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Boiling point | 357+112 −108 K (84+112 −108 °C, 183+202 −194 °F) |
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Density when liquid (at m.p.) | 23.7 g/cm3 (predicted) |
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Oxidation states | 0, (+1), +2, (+4) (parenthesized: prediction) |
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Ionization energies | - 1st: 1155 kJ/mol
- 2nd: 2170 kJ/mol
- 3rd: 3160 kJ/mol
- (more) (all estimated)
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Atomic radius | calculated: 147 pm (predicted) |
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Covalent radius | 122 pm (predicted) |
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Natural occurrence | Cn: Synthetic |
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Crystal structure | body-centered cubic (bcc) (predicted) |
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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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| references |