Question

write full electron configurations for k.
express your answer in complete form in order of increasing orbital energy as a string without blank space between orbitals. for example, 1s^22s^2 should be entered as 1s^22s^2.

Explanation:

Potassium (K) has an atomic number of 19. According to the Aufbau principle, electrons fill orbitals in order of increasing energy. The electron configuration is built by filling the 1s, 2s, 2p, 3s, 3p, and 4s orbitals. The 1s orbital can hold 2 electrons, 2s can hold 2, 2p can hold 6, 3s can hold 2, 3p can hold 6, and 4s can hold 2. Adding these up: \(2 + 2+6 + 2+6 + 1=19\) (since for K, after filling lower - energy orbitals, the last electron goes to 4s).

Answer:

\(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{1}\)