CitePeriodic Table of the Elements: Promethium
| Atomic Number: | 61 |
| Atomic Symbol: | Pm |
| Promethium | |
| Atomic Weight: | (145) |
| ElectronConfiguration: | 2 · 8 · 1823 · 8 · 2 |
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.
See more Encyclopedia articles on: Compounds and Elements
