Zirconium

Zirconium does not react with most acids, under normal conditions. It does dissolve in hydrofluoric acid, HF, most likely forming fluoro complexes

Zirconium does not react with air under normal conditions. If brought to burn, zirconium will react with oxygen, O₂.

Zr(s) + O₂(g) ZrO₂(s)

Zirconium does not appear to react wih alkalis, under normal conditions.

Zirconium reacts with halogens, when heated, forming the corresponding zirconium(IV) halides.

Zr(s) + 2 F₂(g) ZrF₄(s) [white]
Zr(s) + 2 Cl₂(g) ZrCl₄(s) [white]
Zr(s) + 2 Br₂(g) ZrBr₄(s) [white]
Zr(s) + 2 I₂(g) ZrI₄(s) [white]

Zirconium does not reacts with water, under normal conditions.