د ويکيپېډيا، وړیا پوهنغونډ له خوا
Dubnium, 105Db|
Pronunciation | /ˈduːbniəm/ DOOB-nee-əm |
---|
|
|
|
اټومي شمیره (Z) | 105 |
---|
گروپ, پیریود | group 5, period 7 |
---|
بلاک | d-block |
---|
Element category | transition metal |
---|
Mass number | 268 (most stable isotope) |
---|
Electron configuration | [Rn] 5f14 6d3 7s2[۱] |
---|
Electrons per shell | 2, 8, 18, 32, 32, 11, 2 |
---|
|
حالت (at STP) | جامد (predicted)[۲] |
---|
Density near r.t. | 29.3 g/cm3 (predicted)[۱][۳] |
---|
|
Oxidation states | 5, (4), (3)[۱][۳] (parenthesized oxidation states are predictions) |
---|
Ionization energies | - 1st: 656.1 kJ/mol
- 2nd: 1546.7 kJ/mol
- 3rd: 2378.4 kJ/mol
- (more) (all but first estimated)[۱]
|
---|
Atomic radius | empirical: 139 pm (estimated)[۱] |
---|
Covalent radius | 149 pm (estimated)[۴] |
---|
|
Crystal structure | body-centered cubic (bcc) (predicted)[۲] |
---|
CAS Number | 53850-35-4 |
---|
|
Naming | after Dubna, Moscow Oblast, Russia, site of the Joint Institute for Nuclear Research |
---|
Discovery | independently by the University of California and the Joint Institute for Nuclear Research (1970) |
---|
|
|
| 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
دا ليکنه نابشپړه ده، تاسې ددې ليکنې په بشپړولو کې د ويکيپېډيا سره مرسته کولای شئ.
|