Stability of Half-filled and Completely Filled Orbitals — Prelims Questions

Which of the following electronic configurations represents an atom with enhanced stability due to a half-filled subshell?

Which of the following factors primarily contributes to the enhanced stability of half-filled and completely filled orbitals?

How many exchange pairs are possible for electrons with parallel spins in a $d^5$ configuration?

Which of the following elements exhibits an electronic configuration that deviates from the Aufbau principle due to the stability of a completely filled subshell?

Consider the following statements regarding the stability of electronic configurations: I. A $p^3$ configuration is more stable than a $p^2$ configuration. II. A $d^9$ configuration is more stable than a $d^{10}$ configuration. III. The enhanced stability is due to increased electron-electron repulsion. Which of the statements is/are correct?

If an element has an atomic number of 42 (Molybdenum, Mo), what would be its expected electronic configuration based on the enhanced stability of half-filled orbitals?