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Koji simbol označava kalcij?
K
Cl
Ca
Ka
Koji simbol označava željezo?
Ž
Že
F
Fe
Kemijski simbol kisika je (a) .
Koliko ima simbola u Periodnom sustavu elemenata?
100
118
90
64
Tko je je predložio kemijske simbole?
Mendeljejev
Berzelius
Dalton
Curie
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10 questions
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