A highly prominent transition metal element located natively within the block is renowned for exhibi — d and f Block Elements Chemistry Question
Question
A highly prominent transition metal element $M$ located natively within the $3d$ block is renowned for exhibiting a distinctly anomalous ground-state electronic configuration specifically to access the stabilization energy of an exactly half-filled d-subshell. When completely oxidized to its maximum theoretical state, what is the exact numerical magnitude of this highest oxidation state?
💡 Solution & Explanation
The metal $M$ in the $3d$ series that demonstrates an anomalous configuration directly intended to achieve an exact half-filled $d$ -subshell is Chromium ($Cr$, $Z=24$). Its ground state shifts from the expected $[Ar] 3d^4 4s^2$ to the highly stable $[Ar] 3d^5 4s^1$. In highly oxidizing environments (like forming chromates or dichromates), Chromium forcefully utilizes all six of these outer shell electrons for bonding, thus reaching its absolute maximum possible oxidation state of $+6$.