“Radioactive element whose name is derived from the Greek for "unstable"” crossword clue

Reveal the answer to see why it works and where this clue has appeared before.ASTATINE is the answer to the New York Times crossword clue “Radioactive element whose name is derived from the Greek for "unstable"”. It was last seen in the puzzle of May 16, 2025, where it runs at 38 Down and fills 8 squares. It crosses 8 other entries in that grid — those are listed below and are the quickest way to confirm the letters you already have.