Radium
(Redirected from Ra)
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 |
Cs ← Ba → La | |
Fr ← Ra → Ac | |
N/A ← N/A → N/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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Radium has a boiling point of 1140 degrees Celcius.
Radium has a melting point of 700 degress Celcius.
Radium's Normal phase is SOLID.
The name Radium comes from the latin root Radius meaning Ray.
Radium is a metal.
radium was discovered by Madame Marie Curie in 1898.