What are some seven-letter metals?

15 of the 48 metals in Icillion have exactly 7 letters, for example Mercury, Gallium and Bismuth.

Which seven-letter metals start with C?

C is the most common first letter here, with 3 names, such as Cadmium, Caesium and Calcium.

Chemistry · lists

15 seven-letter metals in alphabetical order, from “Bismuth” to “Yttrium”. Each one counts as an answer in Icillion.

15 of the 48 metals have exactly 7 letters (31%).
Most start with C (3), R (2) and B (1).
Only names of one word are counted, and only their letters: spaces, hyphens and apostrophes are not.

What are some seven-letter metals?: 15 of the 48 metals in Icillion have exactly 7 letters, for example Mercury, Gallium and Bismuth.
Which seven-letter metals start with C?: C is the most common first letter here, with 3 names, such as Cadmium, Caesium and Calcium.

How deep does your knowledge go?

Seven prompts a day, twenty seconds each. Obvious answers float on the tip of the iceberg; rare ones sink all the way to the trench.