Natrium ∙ sodium ∙ sodio ∙ sodio
group I: R2O
- melting point: 97.81°C
- boiling point: 882.9°C
- density: 0.971 g/cm³
⚒ minerals: Halite NaCl
The 22Na/7Be ratio can be used to trace intrusions of stratospheric air in the troposphere. — e.g. here
☢ radioisotopes: Na-22 (T1/2=2.6 a) cosmogenic
Na-24 (T1/2=15 h) cosmogenic