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Britannica Sources used in this answer

What is the atomic number of antimony?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
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.

The atomic number of antimony is 51.1