Ang berkelyo (Iningles berkelium) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Bk ug kaiphan nga atomik 97. Ang berkelyo mao ang aktinido.
Quick Facts Berkelium, Panagway ...
| Berkelium |
|---|
97Bk |
|
|
| Panagway |
silvery
 |
| Kinatibuk-ang mga kinaiya |
| Ngalan, simbolo, kaiphan |
berkelium, Bk, 97 |
| Paglitok |
[[Help:Pronunciation respelling key|bər-Plantilya:Smallcaps all-lee-əm]]
less commonly
[[Help:Pronunciation respelling key|Plantilya:Smallcaps all-lee-əm]] |
| Kategoriyang elemento |
aktinido |
| Group, period, block |
n/a, 7, f |
| Gibug-aton sa atomo |
(247) |
| Kontorno sa elektron |
[Rn] 5f9 7s2
2, 8, 18, 32, 27, 8, 2
 Electron shells of berkelium (2, 8, 18, 32, 27, 8, 2) |
| History |
| Pagkadiskobre |
Lawrence Berkeley National Laboratory (1949) |
| Physical properties |
| Phase |
magahi |
| Density (near r.t.) |
(alpha) 14.78 g·cm−3 |
| Density (near r.t.) |
(beta) 13.25 g·cm−3 |
| Melting point |
(beta) 1259 K, 986 °C, 1807 °F |
| Atomic properties |
| Oxidation states |
3, 4 |
| Electronegativity |
1.3 (Pauling scale) |
| Ionization energies |
1st: 601 kJ·mol−1 |
| Atomic radius |
170 pm |
| Miscellanea |
| Crystal structure |
hexagonal close-packed
|
| Magnetic ordering |
paramagnetic |
| Thermal conductivity |
10 W·m−1·K−1 |
| CAS registry number |
7440-40-6 |
| Most stable isotopes |
| Main article: Isotopes of berkelium |
| iso |
NA |
half-life |
DM |
DE (MeV) |
DP |
|---|
| 245Bk |
syn |
4.94 d |
ε |
0.810 |
245Cm |
| α |
6.455 |
241Am |
| 246Bk |
syn |
1.8 d |
α |
6.070 |
242Am |
| ε |
1.350 |
246Cm |
| 247Bk |
syn |
1380 y |
α |
5.889 |
243Am |
| 248Bk |
syn |
>9 y |
α |
5.803 |
244Am |
| 249Bk |
trace |
330 d |
α |
5.526 |
245Am |
| SF |
- |
- |
| β− |
0.125 |
249Cf |
|
| · r |
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