Assertion: krypton's compound | /r/HasProperty | prepared including fluoride
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Source sentences:
text: Although it is extremely unreactive krypton can react with fluorine, and a few compounds of the element have been prepared, including krypton (II) fluoride and krypton clathrates.
text: A few compounds of krypton have been prepared, including krypton (II) fluoride and krypton clathrates.