In 1957 the symbol for this gaseous element was changed from a to ar
Please see below the In 1957 the symbol for this gaseous element was changed from a to ar answer and solution. This clue is part of the Jeopardy Words Daily Challenge and was last seen on August 24 2020. The Jeopardy Daily Challenge is an addictive word puzzle game where you are given 4 clues every single day and you have to correctly find the answers.
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