Difference between revisions of "Actinium"
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{{Element | | {{Element | | ||
name=Actinium | | name=Actinium | | ||
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series=Actinide | | series=Actinide | | ||
density=10 g/cm3 | | density=10 g/cm3 | | ||
| − | melts=1323K,<BR/> | + | melts=1323K,<BR/>1050°C,<BR/>1922°F | |
| − | boils=3471K,<BR/> | + | boils=3471K,<BR/>3198°C,<BR/>5788°F | |
isotopes=none | | isotopes=none | | ||
prior=[[Radium|<FONT color="#7F7FFF">Ra</FONT>]] | | prior=[[Radium|<FONT color="#7F7FFF">Ra</FONT>]] | | ||
Latest revision as of 00:41, 28 September 2007
| Actinium | |
|---|---|
| Ac | |
| In situ availability: | |
| Necessity: | |
| Atomic number: | 89 |
| Atomic mass: | [227] |
| group: | 19 |
| period: | N/A |
| normal phase: | Solid |
| series: | Actinide |
| density: | 10 g/cm3 |
| melting point: | 1323K, 1050°C, 1922°F |
| boiling point: | 3471K, 3198°C, 5788°F |
| Ba ← La → Ce | |
| Ra ← Ac → Th | |
| N/A ← N/A → N/A | |
| Atomic radius (pm): | 195 |
| Bohr radius (pm): | |
| Covalent radius (pm): | |
| Van der Waals radius (pm): | |
| ionic radius (pm): | (+3) - |
| 1st ion potential (eV): | 5.17 |
| Electron Configuration | |
| 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 6s2 6p6 6d1 7s2 | |
| Electrons Per Shell | |
| 2, 8, 18, 32, 18, 9, 2 | |
| Electronegativity: | 1.1 |
| Electron Affinity: | - |
| Oxidation states: | 3 |
| Magnetism: | ? |
| Crystal structure: | Face centered cubic |
Actinium is a Actinide metal.
It has a Face centered cubic crystalline structure.
It does not have any isotopes considered to be natural. Its longest-lived known isotope has an atomic number of 227.
This element has no stable isotopes.
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