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The number of unpaired electron(s) is K2NiF6 is _________ .
Correct answer is '0'. Can you explain this answer?
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The number of unpaired electron(s) is K2NiF6 is _________ .Correct ans...
This means there are 2 unpaired electrons left in 3d orbital. Hence, K 2 N i F 6 has 2 unpaired electrons.
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The number of unpaired electron(s) is K2NiF6 is _________ .Correct ans...
Explanation:
- K2NiF6 is an ionic compound.
- It contains Ni2+ ion which has d8 electron configuration i.e. it has 2 electrons in the d orbital.
- K2NiF6 has octahedral geometry.
- In octahedral geometry, the d orbitals split into two sets, namely, t2g and eg.
- The t2g set contains 3 orbitals (dxy, dyz, dxz) and the eg set contains 2 orbitals (dx2-y2 and dz2).
- In K2NiF6, all the 6 ligands are fluorine atoms which are strong field ligands.
- Due to the strong field effect of the ligands, the d orbitals split such that the t2g set is lower in energy and the eg set is higher in energy.
- According to Hund's rule, electrons first occupy the degenerate orbitals singly with parallel spins before pairing up.
- In K2NiF6, since all the 6 electrons in the d set are singly occupied with parallel spins, there are no unpaired electrons.
- Therefore, the number of unpaired electrons in K2NiF6 is 0.
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