What are the stable isotopes of antimony?

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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.

Antimony has two stable isotopes: antimony-121 and antimony-123. These two isotopes occur in nature and are nearly equal in abundance. Additionally, many radioactive isotopes of the element have been prepared.1