Molybdenum is element 42, a transition metal of the d block, in group 6, period 5. Its ground-state configuration is [Kr] 4d5 5s1, and it usually shows the oxidation states 0, 2, 3, 4, 5, 6.
It was discovered in 1778, by Scheele.
Name origin: the Greek molybdos meaning 'lead'.
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