←Zr   As↑   ↓Sb   Mo→

Niob ∙ niobium ∙ niobio ∙ niobio
group V: RH₃, R₂O₅

• melting point: 2468°C ±10°C
• boiling point: 4742°C
• density: 8.57 g/cm³

Nb is used for body piercings.

☢ radioisotopes:
Nb-95 (T1/2=35 d) fission product