What is electronic configuration an placement of orbitals?

Electronic configuration describes the distribution of electrons in an atom's orbitals. It indicates how electrons fill available energy levels and sublevels according to specific rules, such as the Aufbau principle, Pauli exclusion principle, and Hund's rule. The placement of orbitals refers to the arrangement of these energy levels and sublevels (s, p, d, f) in a way that reflects the atom's overall energy state and chemical behavior. This configuration helps predict how atoms will interact in chemical reactions.