←Xe   Ag↑   ↓Au   Ba→

Cäsium ∙ césium ∙ cesio ∙ cesio
group I: R₂O

• melting point: 28.4°C
• boiling point: 669.3°C
• density: 1.873 g/cm³

The three main contributors to the committed effective dose [from global fallout] received by the world population are carbon-14 (70%), cesium-137 (13%) and strontium-90 (3%). — radioactivity.eu.com

2015 wurde [bei Triagemessungen] ein Rekordwert für Wildschweinfleisch … von 9’920 Bq/kg ¹³⁷Cs festgestellt. — URA-JB

☢ radioisotopes:
Cs-137 (T1/2=30 a) fission product
Cs-134 (T1/2=2 a) activation product

¹³⁴Cs is found in spent nuclear fuel but is not produced by nuclear weapon explosions, as it is only formed by neutron capture on stable ¹³³Cs, which is only produced by beta decay of ¹³³Xe … — Wikipedia