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Dubnium, 105Db|
Pronunciation | |
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Mass number | [268] |
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Atomic number (Z) | 105 |
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Group | group 5 |
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Period | period 7 |
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Block | d-block |
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Electron configuration | [Rn] 5f14 6d3 7s2[3] |
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Electrons per shell | 2, 8, 18, 32, 32, 11, 2 |
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Phase at STP | solid (predicted)[4] |
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Density (near r.t.) | 21.6 g/cm3 (predicted)[5][6] |
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Oxidation states | common: (none)
(+3), (+4), (+5)[3] |
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Ionization energies | - 1st: 665 kJ/mol
- 2nd: 1547 kJ/mol
- 3rd: 2378 kJ/mol
- (more) (all but first estimated)[3]
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Atomic radius | empirical: 139 pm (estimated)[3] |
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Covalent radius | 149 pm (estimated)[7] |
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Natural occurrence | synthetic |
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Crystal structure | body-centered cubic (bcc) (predicted)[4] |
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CAS Number | 53850-35-4 |
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Naming | after Dubna, Moscow Oblast, Russia, site of Joint Institute for Nuclear Research |
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Discovery | independently by the Lawrence Berkeley Laboratory and the Joint Institute for Nuclear Research (1970) |
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File:Symbol category class.svg Category: Dubnium | references |
child table, as reused in {IB-Db} |
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References
These references will appear in the article, but this list appears only on this page.
- ↑ Lua error in Module:Citation/CS1/Configuration at line 2088: attempt to index field '?' (a nil value).
- ↑ Lua error in Module:Citation/CS1/Configuration at line 2088: attempt to index field '?' (a nil value).
- ↑ Jump up to: 3.0 3.1 3.2 3.3 Lua error in Module:Citation/CS1/Configuration at line 2088: attempt to index field '?' (a nil value).
- ↑ Jump up to: 4.0 4.1 Lua error in Module:Citation/CS1/Configuration at line 2088: attempt to index field '?' (a nil value).
- ↑ Lua error in Module:Citation/CS1/Configuration at line 2088: attempt to index field '?' (a nil value).
- ↑ Lua error in Module:Citation/CS1/Configuration at line 2088: attempt to index field '?' (a nil value).
- ↑ Lua error in Module:Citation/CS1/Configuration at line 2088: attempt to index field '?' (a nil value).
- ↑ Jump up to: 8.0 8.1 Lua error in Module:Citation/CS1/Configuration at line 2088: attempt to index field '?' (a nil value).
- ↑ Lua error in Module:Citation/CS1/Configuration at line 2088: attempt to index field '?' (a nil value).
- ↑ Jump up to: 10.0 10.1 10.2 10.3 Six New Isotopes of the Superheavy Elements Discovered. Berkeley Lab. News center. October 26, 2010
- ↑ Jump up to: 11.0 11.1 11.2 11.3 Lua error in Module:Citation/CS1/Configuration at line 2088: attempt to index field '?' (a nil value).
- ↑ Jump up to: 12.0 12.1 12.2 12.3 Lua error in Module:Citation/CS1/Configuration at line 2088: attempt to index field '?' (a nil value).
- ↑ Jump up to: 13.0 13.1 Lua error in Module:Citation/CS1/Configuration at line 2088: attempt to index field '?' (a nil value).
- ↑ Lua error in Module:Citation/CS1/Configuration at line 2088: attempt to index field '?' (a nil value).
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