The electron configuration for antimony (Sb) is [Kr] 5s2 4d10 5p3.
Antimony is located in group 15 of the periodic table and has an atomic number of 51. To derive its electron configuration, we start with the noble gas that comes before it in the periodic table, which is krypton (Kr), with an atomic number of 36. From krypton, we add the remaining electrons, filling the 5s and 4d sublevels before populating the 5p sublevel. The 5s holds 2 electrons, the 4d is fully filled with 10 electrons, and the 5p sublevel contains 3 electrons, totaling 51 electrons, which is the atomic number of antimony.