Final answer:
The 1s² 2s³ 2p³ configuration is inaccurate because it violates the Pauli exclusion principle and Hund's rule; the 2s subshell can only accommodate 2 electrons, and each p orbital can hold a maximum of 2 electrons with opposite spins.
Step-by-step explanation:
The reason why the electron configuration 1s² 2s³ 2p³ is not accurate is because it violates the Pauli exclusion principle and Hund's rule. The 2s subshell can contain at most 2 electrons, not 3 as shown in the configuration. Moreover, each p orbital can accommodate up to 2 electrons with opposite spins, but not 3. A correct configuration must follow the aufbau principle, which specifies that electrons fill atomic orbitals in order of increasing energy levels, taking into account both the principal quantum number (n) and the orbital type (s, p, d, f).
Key Principles for Electron Configuration:
- Aufbau Principle: Electrons fill orbitals starting at the lowest available energy state before filling higher states (1s before 2s).
- Pauli Exclusion Principle: No two electrons can have identical sets of quantum numbers; an orbital can hold 2 electrons that have opposite spins.
- Hund's Rule: Electrons will fill an unoccupied orbital before they pair up in an occupied orbital.