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| Version | User | Scope of changes |
|---|---|---|
| Oct 20 2006, 10:21 PM EDT (current) | AndrewChang | 1 photo added |
| Oct 20 2006, 10:03 PM EDT | AndrewChang | 42 words added |
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| My Nucleus Atomic Number: 89 Average Atomic Mass: 227 Half-Life: 21.8 years | My Electrons Valence electrons: 2 Electron Configuration  | My Properties Actinium's reaction with air Color: silvery Standard State: solid at 298k Classification: Metallic Actinium is dangerously radioactive and is found in uranium ores. It is 150 times more radioactive than radium. |
| My Home (Body, Planet, Universe)
|  | My Compounds (My Friends!) |
| My Story Discovered By: Andre Debierne Origin of the name actinium comes from the Greek word "aktinos" meaning "ray". Actinium was discovered while using seperation techniques for rare earth oxides. | My Jobs Uses of Actinium:
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