Crossword puzzle clue "most reactive element"

Here are the possible solutions for most reactive element clue

Answer
Clue
Relevancy
fluorine
Clue
Most reactive element
Definition
a gaseous element, also FLUORIN
antigen
Clue
Reactive toxin
Definition
a substance that stimulates the production of antibodies, also ANTIGENE
barium
Clue
Reactive earth metal
Definition
a metallic element
cesium
Clue
Highly reactive metal
Definition
a metallic element
flak
Clue
Reactive criticism
Definition
antiaircraft fire
inert
Clue
Not reactive
Not reactive, as gases
Not reactive, as some gases
Definition
passive

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