Give the Ground State Electron Configuration and Number of Unpaired

Give the ground state electron configuration and number of unpaired electrons for Sb³⁺. Hint: Draw the orbital diagram of Sb^{3+ to determine unpaired electrons.}

A) [Kr] 4d¹ 5s¹; 2 unpaired electrons
B) [Ar]; 1 unpaired electron
C) [Kr] 4d¹⁰ 5s²; 0 unpaired electrons
D) [Kr] 4d⁷ 5s²; 3 unpaired electrons
E) [Ar] 4d⁴ 5s²; 4 unpaired electrons