Antimony is element 51, a metalloid of the p block, in group 15, period 5. Its ground-state configuration is [Kr] 4d10 5s2 5p3, and it usually shows the oxidation states -3, 0, 3, 5.
Antimony has been known since antiquity, so no discovery is credited for it.
Name origin: composed from the Greek anti, 'against', and monos, 'alone' (stibium in Latin).
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