Ang actinyo (Iningles actinium) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Ac ug kaiphan nga atomik 89. Ang actinyo mao ang aktinido.
Quick Facts Actinium, Panagway ...
| Actinium |
|---|
89Ac |
|
|
| Panagway |
| silvery-white |
| Kinatibuk-ang mga kinaiya |
| Ngalan, simbolo, kaiphan |
actinium, Ac, 89 |
| Paglitok |
[[Help:Pronunciation respelling key|ak-Plantilya:Smallcaps all-nee-əm]] |
| Kategoriyang elemento |
aktinido
sometimes considered a transition metal |
| Group, period, block |
3, 7, f |
| Gibug-aton sa atomo |
(227) |
| Kontorno sa elektron |
[Rn] 6d1 7s2
2, 8, 18, 32, 18, 9, 2
 Electron shells of actinium (2, 8, 18, 32, 18, 9, 2) |
| History |
| Pagkadiskobre |
André-Louis Debierne (1899) |
| First isolation |
André-Louis Debierne (1899) |
| Physical properties |
| Phase |
magahi |
| Density (near r.t.) |
10 g·cm−3 |
| Melting point |
(circa) 1323 K, 1050 °C, 1922 °F |
| Boiling point |
3471 K, 3198 °C, 5788 °F |
| Heat of fusion |
14 kJ·mol−1 |
| Heat of vaporization |
400 kJ·mol−1 |
| Molar heat capacity |
27.2 J·mol−1·K−1 |
| Atomic properties |
| Oxidation states |
3
(neutral oxide) |
| Electronegativity |
1.1 (Pauling scale) |
| Ionization energies |
1st: 499 kJ·mol−1 |
| 2nd: 1170 kJ·mol−1 |
| Covalent radius |
215 pm |
| Miscellanea |
| Crystal structure |
face-centered cubic
|
| Magnetic ordering |
no data |
| Thermal conductivity |
12 W·m−1·K−1 |
| CAS registry number |
7440-34-8 |
| Most stable isotopes |
| Main article: Isotopes of actinium |
| iso |
NA |
half-life |
DM |
DE (MeV) |
DP |
|---|
| 225Ac |
trace |
10 d |
α |
5.935 |
221Fr |
| 226Ac |
syn |
29.37 h |
β− |
1.117 |
226Th |
| ε |
0.640 |
226Ra |
| α |
5.536 |
222Fr |
| 227Ac |
trace |
21.772 y |
β− |
0.045 |
227Th |
| α |
5.042 |
223Fr |
|
| · r |
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