What is the electron configuration of Bismuth (Bi), atomic number 83?
a) [Xe]6s²⁵f¹⁴⁶d¹⁰6p³
b) [Xe]6s²⁵f¹⁴⁵d¹⁰6p³
c) [Xe]6s²⁴f¹⁴⁶d¹⁰6p³
d) [Xe]6s²⁴f¹⁴⁵d¹⁰6p³