Ang Bohrium o Boryo ay isang elementong pangkimika na mayroong simbolong Bh at atomikong bilang na 107 (nasa posisyong 107 sa talahanayang peryodiko, at ito ang pinaka mabigat na kasapi sa pangkat na 7 (VIIB). Isa itong elementong sintetiko na ang pinaka matatag na nakikilalang isotopo na 270Bh, ay mayroong kalahating buhay na 61 mga segundo. Natiyak ng mga eksperimentong pangkimika na ang mahuhulang posisyon ng bohrium ay mayroon mas mabigat na homologo sa rhenium na nagkakaroon ng pormasyon o pagkakabuo ng isang matatag na katayuan ng oksidasyon na +7.[12] Pinangalanan ang bohrium magmula kay Niels Bohr.
Agarang impormasyon Bohrium, Bigkas ...
Bohrium, 107Bh|
Bigkas | // (BOR-ee-əm) |
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Bilang na pangmasa | [270] (unconfirmed: 278) |
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|
|
Re ↑ Bh ↓ — |
seaborgium ← bohrium → hassium |
|
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Atomikong bilang (Z) | 107 |
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Group | 7 |
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Period | 7 |
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Block | d-block |
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Electron configuration | [Rn] 5f14 6d5 7s2[1][2] |
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Electrons per shell | 2, 8, 18, 32, 32, 13, 2 |
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|
Phase at STP | solid (predicted)[3] |
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Density (near r.t.) | 26–27 g/cm3 (predicted)[4][5] |
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Oxidation states | (+3), (+4), (+5), +7[2][6] (Nakasaknong: prediksyon) |
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Ionization energies | - 1st: 740 kJ/mol
- 2nd: 1690 kJ/mol
- 3rd: 2570 kJ/mol
- (more) (all but first estimated)[2]
|
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Atomic radius | empirical: 128 pm (predicted)[2] |
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Covalent radius | 141 pm (estimated)[7] |
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Natural occurrence | sintetiko |
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Crystal structure | hexagonal close-packed (hcp) (predicted)[3] |
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CAS Number | 54037-14-8 |
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Naming | after Niels Bohr |
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Discovery | Gesellschaft für Schwerionenforschung (1981) |
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Main isotopes[8] |
Decay |
|
abundance |
half-life (t1/2) |
mode |
product |
267Bh |
synth |
17 s |
α |
263Db |
270Bh |
synth |
2.4 min |
α |
266Db |
271Bh |
synth |
2.9 s[9] |
α |
267Db |
272Bh |
synth |
8.8 s |
α |
268Db |
274Bh |
synth |
40 s[10] |
α |
270Db |
278Bh |
synth |
11.5 min?[11] |
SF |
– |
|
|
Kategorya: Bohrium | references |
Isara
Johnson, E.; Fricke, B.; Jacob, T.; Dong, C. Z.; Fritzsche, S.; Pershina, V. (2002). "Ionization potentials and radii of neutral and ionized species of elements 107 (bohrium) and 108 (hassium) from extended multiconfiguration Dirac–Fock calculations". The Journal of Chemical Physics. 116 (5): 1862–1868. Bibcode:2002JChPh.116.1862J. doi:10.1063/1.1430256.{{cite journal}}
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Hoffman, Darleane C.; Lee, Diana M.; Pershina, Valeria (2006). "Transactinides and the future elements". Sa Morss; Edelstein, Norman M.; Fuger, Jean (mga pat.). The Chemistry of the Actinide and Transactinide Elements (ika-3rd (na) edisyon). Dordrecht, The Netherlands: Springer Science+Business Media. ISBN 1-4020-3555-1.{{cite book}}
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Gyanchandani, Jyoti; Sikka, S. K. (10 Mayo 2011). "Physical properties of the 6 d -series elements from density functional theory: Close similarity to lighter transition metals". Physical Review B. 83 (17): 172101. doi:10.1103/PhysRevB.83.172101.{{cite journal}}
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Kratz; Lieser (2013). Nuclear and Radiochemistry: Fundamentals and Applications (ika-3rd (na) edisyon). p. 631.{{cite book}}
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Hofmann, S.; Heinz, S.; Mann, R.; Maurer, J.; Münzenberg, G.; Antalic, S.; Barth, W.; Burkhard, H. G.; Dahl, L.; Eberhardt, K.; Grzywacz, R.; Hamilton, J. H.; Henderson, R. A.; Kenneally, J. M.; Kindler, B.; Kojouharov, I.; Lang, R.; Lommel, B.; Miernik, K.; Miller, D.; Moody, K. J.; Morita, K.; Nishio, K.; Popeko, A. G.; Roberto, J. B.; Runke, J.; Rykaczewski, K. P.; Saro, S.; Scheidenberger, C.; Schött, H. J.; Shaughnessy, D. A.; Stoyer, M. A.; Thörle-Popiesch, P.; Tinschert, K.; Trautmann, N.; Uusitalo, J.; Yeremin, A. V. (2016). "Review of even element super-heavy nuclei and search for element 120". The European Physics Journal A. 2016 (52). Bibcode:2016EPJA...52..180H. doi:10.1140/epja/i2016-16180-4.{{cite journal}}
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