… Fluorine, chlorine, bromine and iodine. …
Explanatory notes
… Cerium............... Ce 58 Rare‑earth metal (28.05). Chlorine............. Cl 17 Non‑metal (28.01). … Zr 40 Base metal (81.09). 28.01 ‑ Fluorine, chlorine, bromine and iodine. 2801.10 ‑ Chlorine 2801.20 ‑ …