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You answered "Neptunium". Click "CONTINUE" to proceed to the next question.
Interesting fact:
There are 118 elements in the periodic table. 90 of these elements can be found in nature, while others are strictly man-made. Technetium was the first man-made element and its discovery was confirmed in 1937 at the University of Palermo by Carlo Perrier and Emilio Segrè.