Element between bromine and rubidium (7)

I believe the answer is:

krypton

(Other definitions for krypton that I've seen before include "Inert gas used in florescent lights (7)" , "Pry knot (anag) - gas" , "Chemical element, Kr" , "Gas used in lasers etc" , "Noble gas, Kr" .)

I've seen this clue in The New York Times.

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