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Potassium ( 19 K) has 25 known isotopes from 34 K to 57 K as well as 31 K, as well as an unconfirmed report of 59 K. [3] Three of those isotopes occur naturally: the two stable forms 39
Twenty Thousand Leagues Under the Seas (French: Vingt Mille Lieues sous les mers) is a science fiction adventure novel by the French writer Jules Verne.It is often considered a classic within both its genres and world literature.