Which of the following transition elements will have a half-filled d-orbital?

Titanium (Ti)

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Iron (Fe)

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Chromium (Cr)

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Zinc (Zn)

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Solution

The correct option is C
Chromium (Cr)

Among all the d-block elements, elements of 6th and 7th group have half filled d-orbitals. Elements of 7th group have half-filled d-orbitals by default configuration where as elements of 6th group have half filled d-orbitals because energy required to pair two electrons in the s orbitals of the next orbit is more than the energy required to put an electron in the d orbital of the previous orbit.

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