Question #44708

In a hypothetical universe, the spin quantum number ($m_s$) can take three distinct values: $-\frac{1}{2}, 0, +\frac{1}{2}$. All other quantum numbers ($n, l, m_l$) follow the identical rules as in our universe. The Aufbau principle, Pauli's exclusion principle, and Hund's rule of maximum multiplicity remain valid. Assume the energy difference between the $4s$ and $3d$ subshells is similar to our universe, meaning exchange energy stabilization is the primary driver for anomalous electronic configurations.\n\nDetermine the atomic number ($Z$) of the first transition element expected to exhibit an anomalous electronic configuration, and calculate the total number of exchange pairs present in its $3d$ subshell in the ground state.