Radium

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Radium
Ra
In situ availability:
Necessity:
Atomic number: 88
Atomic mass: [226]
group: 2
period: 7
normal phase: Solid
series: Alkaline earth metals
density: 5.5 g/cm3
melting point: 973K,
700°C,
1292°F
boiling point: 2010K,
1737°C,
3159°F
CsBaLa
Fr ← Ra → Ac
N/AN/AN/A
Atomic radius (pm): 215
Bohr radius (pm):
Covalent radius (pm):
Van der Waals radius (pm):
ionic radius (pm): (+2) 162
1st ion potential (eV): 5.28
Electron Configuration
1s2
2s2 2p6
3s2 3p6 3d10
4s2 4p6 4d10 4f14
5s2 5p6 5d10
6s2 6p6
7s2
Electrons Per Shell
2, 8, 18, 32, 18, 8, 2
Electronegativity: 0.9
Electron Affinity: -
Oxidation states: 2
Magnetism: Nonmagnetic
Crystal structure: Body centered cubic

Radium is a Alkaline earth metal in group 2. It has a Body centered cubic crystalline structure. It does not have any isotopes considered to be natural. Its longest-lived known isotope has an atomic number of 226. This element has no stable isotopes.




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