there are 51 electrons in all. So the atomic number of the element is 51 and the element is antimony.
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The noble gas notation for antimony is [Kr] 4d10 5s2 5p3, where [Kr] represents the electron configuration of krypton (a noble gas) that comes before the electron configuration of antimony.
Sb (antimony) has 51 electrons. Its noble gas notation is [Kr] 4d10 5s2 5p3
The noble gas shorthand for antimony is [Kr] 4d^10 5s^2 5p^3.
The noble gas configuration for antimony (Sb) is [Kr] 4d^10 5s^2 5p^3.
[Kr] 5s2 4d10 5p2