1.

Write observed electronic configuration of elements from first transition series having half filled d-orbitals.

Answer»
ElementSymbolAtomic NumberExpected Electronic ConfigurationObserved Electronic Configuration
ChromiumCr24[Ar] 3d4 4s2[Ar] 3d5 4s1
ManganeseMn25[Ar] 3d5 4s2[Ar] 3d5 4s2

[Ar] = 1s2 2s2 2p6 3s2 3p6



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