Actinium

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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
BaLaCe
Ra ← Ac → Th
N/AN/AN/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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