Final answer:
The electron configurations for the elements with atomic numbers 15, 12, 9, and 18 are 1s²2s²2p¶3s²3p³ for Phosphorus, 1s²2s²2p¶3s² for Magnesium, 1s²2s²2pµ for Fluorine, and 1s²2s²2p¶3s²3p¶ for Argon, respectively.
Step-by-step explanation:
The electron configuration of an element details the distribution of electrons in the atom's shells and subshells based on the principles of quantum mechanics. We'll list the electron configurations for various elements based on their atomic numbers.
- Element with Atomic Number 15 (Phosphorus): 1s²2s²2p¶3s²3p³
- Element with Atomic Number 12 (Magnesium): 1s²2s²2p¶3s²
- Element with Atomic Number 9 (Fluorine): 1s²2s²2pµ
- Element with Atomic Number 18 (Argon): 1s²2s²2p¶3s²3p¶
These configurations were determined using the principles of the Aufbau principle, Hund's rule, and the Pauli exclusion principle.