Chromium () and Molybdenum () exhibit anomalous ground state electronic configurations () to achieve half-filled stability. Does Tungsten (, ), lying in the same group, exhibit a similar anomaly?

Question

Chromium ($Cr$) and Molybdenum ($Mo$) exhibit anomalous ground state electronic configurations ($d^5 s^1$) to achieve half-filled stability. Does Tungsten ($W$, $Z=74$), lying in the same group, exhibit a similar anomaly?

Prashant Kotian · Accepted Answer

Correct answer: B. While () and () transfer an -electron to the -subshell to maximize exchange energy and attain half-filled stability, Tungsten () does not follow this trend due to complex relativistic effects, screening factors, and higher nuclear electronic attraction. The configuration of remains non-anomalous: .

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