Definition

A highly unstable and radioactive element that is part of the halogen group, similar to iodine, and has a very short half-life.

Example

Astatine is one of the rarest elements on Earth and is used in some types of cancer treatment.

Conversation

Did you know that astatine is one of the rarest elements on Earth?

Really? I had no idea it was that uncommon.

Yeah, it's also radioactive and pretty unstable.

That sounds fascinating! I should read more about it.

Synonyms & Antonyms

Root Explanation

Astatine → The word 'astatine' is derived from the Greek 'astatos' (meaning unstable) and the suffix '-ine' (used to denote chemical elements). The name reflects the element's highly unstable and radioactive nature.

Memory Tip

Think of 'unstable' ('astatos') to remember that 'astatine' is a highly unstable element.

Visually Confused Words