Periodic Table of the Elements: Radium
Related article: Periodic Table of the Elements (table)Periodic Table of the Elements
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| Atomic Number: | 88 |
| Atomic Symbol: | Ra |
| Radiumradium [Lat. radius=ray], radioactive metallic chemical element; symbol Ra; at. no. 88; mass number of most stable isotope 226; m.p. 700°C;; b.p. 1,140°C;; sp. gr. about 6.0; valence +2. Radium is a lustrous white radioactive metal. ..... Click the link for more information. | |
| Atomic Weight: | (226) |
| Electron Configuration: | 2 · 8 · 18 32 · 18 8 · 2 |