CHEMISTRY

====media type="youtube" key="5_I6vj-lXNM" width="425" height="350" Radium  -- Symbol : Ra / The meaning of Radium is that is rare, brilliant white, luminescent, highly radioactive metallic element found in very small amounts in uranium ores ====

Atomic Weight : 226.0254
====Electron Configuration : 7s to the square ====  Radium was discovered by Marie Sktodowska-Curie and her husband Pierre in 1898 in pitchblende coming from North Bohemia, in the Czech Republic. Radium is obtained commercially as bromide and chloride, the pure metal is brilliant white whrn freshly prepared, but blackens on exposure to air , probably due to formation of the nitride.


 * **Ionic Radius:** 1.43Å
 * **Filling Orbital:** 7s2
 * **Number of Electrons (with no charge):** 88
 * **Number of Neutrons (most common/stable nuclide):** 138
 * **Number of Protons:** 88
 * **Oxidation States:** 2
 * <span style="font-family: 'Comic Sans MS', cursive; color: #800000; font-size: 120%;">**Valence Electrons**: 7s2


 * <span style="font-family: 'Comic Sans MS', cursive; color: #800000;"> || **<span style="font-family: 'Comic Sans MS', cursive;">Isotope ** ||
 * **<span style="font-family: 'Comic Sans MS', cursive;">Radium emanation ** || **<span style="font-family: 'Comic Sans MS', cursive;">222Rn ** ||
 * **<span style="font-family: 'Comic Sans MS', cursive;">Radium A ** || **<span style="font-family: 'Comic Sans MS', cursive;">218Po ** ||
 * **<span style="font-family: 'Comic Sans MS', cursive;">Radium B ** || **<span style="font-family: 'Comic Sans MS', cursive;">214Pb ** ||
 * **<span style="font-family: 'Comic Sans MS', cursive;">Radium C ** || **<span style="font-family: 'Comic Sans MS', cursive;">214Bi ** ||
 * **<span style="font-family: 'Comic Sans MS', cursive;">Radium C1 ** || **<span style="font-family: 'Comic Sans MS', cursive;">214Po ** ||
 * **<span style="font-family: 'Comic Sans MS', cursive;">Radium C2 ** || **<span style="font-family: 'Comic Sans MS', cursive;">210Tl ** ||
 * **<span style="font-family: 'Comic Sans MS', cursive;">Radium D ** || **<span style="font-family: 'Comic Sans MS', cursive;">210Pb ** ||
 * **<span style="font-family: 'Comic Sans MS', cursive;">Radium E ** || **<span style="font-family: 'Comic Sans MS', cursive;">210Bi ** ||
 * **<span style="font-family: 'Comic Sans MS', cursive;">Radium F ** || **<span style="font-family: 'Comic Sans MS', cursive;">210Po ** ||