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fermium
Heslo fermium Heslo anglicky Fermium Vysvetľujúca pozn. v angl. A man-made radioactive actinide with atomic symbol Fm, and atomic number 100. Its known isotopes range from 244-254 and 256-258. Its valence can be +2 or +3. Like einsteinium, it was discovered in 1952 in the debris from a thermonuclear explosion. 
predmetové heslo
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