Name a chemical element whose symbol is one letter

Notes on this prompt

• With 14 accepted answers, this prompt is narrower than a typical Krillion prompt (about 564), so there’s less room to go deep.
• 2 answers (14%) are Deep Cuts and 4 are Rare, while 4 sit at Plankton.

Quick picks

The shortest Rare or deeper answers, easy to type before the timer runs out.

Boron +60 Iodine +60 Fluorine +60

Also accepted elsewhere

The same answer counted for a different prompt in the archive.

• Yttrium also counted for Name a metal (pure elements only; alloys like steel don't count) · #88
• Boron also counted for Name a word that could be in Wordle (5 letters) · #101
• Iodine also counted for Name something you can measure about the human body · #106
• Phosphorus also counted for Name something listed on a nutrition facts label · #81
• Carbon also counted for Name an app or service meant for editing photos · #92