Word: eka
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Dates: during 1930-1939
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...Alabama Polytechnic Institute Professor Fred Allison early last year recognized eka-cesium, the 80th element in the Periodic Table (TIME, Feb. 17, 1930). Last week he had eka-iodine, the 88th and last unknown element...
...elements which the late great Russian Dmitri Ivanovitch Mendelèeff (1834-1907) predicates with his Periodic Law, 16 have been discovered since 1894.* Two remain to be isolated-eka-iodine and eka-cesium.† Last week Dr. Fred Allison and Edgar Jackson Murphy of Alabama Polytechnic Institute at Auburn, Ala., reported that they had "evidence of considerable weight for the presence" of eka-cesium in certain salts they had reduced from lepidolite, a form of mica, and pollucite, a mineral consisting chiefly of cesium, aluminum and silicon. When they break down their salts they will get a soft silvery...
...Eka-iodine, the other element yet to be isolated, belongs to the halogen group- with fluorine, chlorine, bromine and iodine...
...Eka, Sanskrit for one or first, is a prefix applied to the first undiscovered element in a group of the periodic system...