Quick Facts
| Property | Value |
|---|---|
| Symbol | Es |
| Atomic Number | 99 |
| Atomic Mass | [252] u |
| Category | Actinide |
| Period | 7 |
| Group | 3 |
| Block | f |
| Electron Configuration | [Rn] 5f¹¹ 7s² |
History and Discovery
Discovered by: Albert Ghiorso and colleagues Year of Discovery: 1952 Location: Discovered in debris from first hydrogen bomb test (Ivy Mike)
Etymology
Named after Albert Einstein.
Interesting Facts
- Discovered in nuclear explosion debris
- Named after Albert Einstein
- Only microgram quantities have been produced
- Glows visibly due to radioactive decay
- First identified in fallout from thermonuclear testing