Shell Structure
Crystal Structure
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| Element | Information |
| Atomic Number: | 89 |
| Symbol: | Ac |
| Name: | Actinium |
| Name Origin: | Greek aktis, aktinos, "ray" |
| Type: | Rare Earth |
| Atomic Mass: | 227 |
| Melting Point: | 1050 |
| Boiling Point: | 3200 |
| Neutrons: | 138 |
| Density: | 10.07 |
| Crystal Structure: | Cubic, face centered |
| Discovered: | 1899 |
| Discoverers: | Discovered by André-Louis Debierne (France). |
| Other Names: | |
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