د ويکيپېډيا، وړیا پوهنغونډ له خوا
Dubnium, 105Db|
| Pronunciation | /ˈduːbniəm/
DOOB-nee-əm |
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| اټومي شمیره (Z) | 105 |
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| گروپ, پیریود | group 5, period 7 |
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| بلاک | d-block |
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| Element category | transition metal |
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| Mass number | 268 (most stable isotope) |
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| Electron configuration | [Rn] 5f14 6d3 7s2[۱] |
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Electrons per shell | 2, 8, 18, 32, 32, 11, 2 |
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| حالت (at STP) | جامد (predicted)[۲] |
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| Density near r.t. | 29.3 g/cm3 (predicted)[۱][۳] |
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| Oxidation states | 5, (4), (3)[۱][۳] (parenthesized oxidation states are predictions) |
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| Ionization energies | - 1st: 656.1 kJ/mol
- 2nd: 1546.7 kJ/mol
- 3rd: 2378.4 kJ/mol
- (more) (all but first estimated)[۱]
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| Atomic radius | empirical: 139 pm (estimated)[۱] |
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| Covalent radius | 149 pm (estimated)[۴] |
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| Crystal structure | body-centered cubic (bcc) (predicted)[۲] Body-centered cubic crystal structure for dubnium |
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| CAS Number | 53850-35-4 |
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| Naming | after Dubna, Moscow Oblast, Russia, site of the Joint Institute for Nuclear Research |
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| Discovery | independently by the University of California and the Joint Institute for Nuclear Research (1970) |
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| | references | in Wikidata |
ډوبنيوم (په انگرېزي: Dubnium) له کیمیاوي عناصرو څخه یو دی چې په تناوبي جدول کې د Db سمبول او ۱۰۵ اتمي شمېرې په وسیله ښودل شوی دی.
- ↑ ۱٫۰ ۱٫۱ ۱٫۲ ۱٫۳ ۱٫۴ Lua error in Module:Citation/CS1/Utilities at line 38: bad argument #1 to 'ipairs' (table expected, got nil).
- ↑ ۲٫۰ ۲٫۱ Lua error in Module:Citation/CS1/Utilities at line 38: bad argument #1 to 'ipairs' (table expected, got nil).
- ↑ ۳٫۰ ۳٫۱ Lua error in Module:Citation/CS1/Utilities at line 38: bad argument #1 to 'ipairs' (table expected, got nil).
- ↑ Chemical Data. Dubnium - Db, Royal Chemical Society
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 دا ليکنه نابشپړه ده، تاسې ددې ليکنې په بشپړولو کې د ويکيپېډيا سره مرسته کولای شئ.
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