radioactive element whose name is derived from the greek for unstable

The radioactive element whose name is derived from the Greek for “unstable” is astatine.

Quick Scoop

• Element name: astatine (symbol At)

• Origin of the name: from Ancient Greek ástatos (ἄστατος), meaning “unstable.”

• Atomic number: 85.

• Why “unstable”? All of its known isotopes are highly radioactive and short‑lived, so the element is intrinsically unstable in nature.

Crossword and puzzle helper sites explicitly give ASTATINE as the answer to the clue “radioactive element whose name is derived from the Greek for ‘unstable’.”

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