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antimony

How long ago was antimony used to make a Chaldean vase?

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A labeled periodic table entry for antimony shows its symbol Sb, atomic number 51, atomic weight 121.76, electron configuration, and name. It is a solid, weakly acidic other metal with a rhombohedral crystal structure at room temperature. — antimony Properties of antimony.

Fragments of a Chaldean vase made of antimony have been estimated to date back to approximately 4000 BCE.1