←Rb   Zn↑   ↓Cd   Y→

Strontium ∙ strontium ∙ stronzio ∙ estroncio
group II: RO

• melting point: 769°C
• boiling point: 1384°C
• density: 2.6 g/cm³

… monitoring [the] ⁹⁰Sr activity in milk teeth shows a sharp increase in activity that is attributable to [the] atmospheric nuclear weapon tests … — P. Froidevaux

☢ radioisotopes:
Sr-90 (T1/2=28.8 a) fission product

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