Cs
Cesium
Z = 55 · Alkali Metal · 132.9 u
Basic properties
- Atomic number (Z)
- 55
- Standard atomic mass
- 132.9 u
- Category
- Alkali Metal
Isotopes & cross-section data
| Isotope | Mass (A) | Half-life | ZAID | Libraries |
|---|---|---|---|---|
| Cs-133 | 133 | Stable | 55133 | .80c.71c |
| Cs-134 | 134 | 2.0652 y | 55134 | .80c.71c |
| Cs-135 | 135 | 2.3e6 y | 55135 | .80c.71c |
| Cs-137 | 137 | 30.17 y | 55137 | .80c.71c |