AIIMS 2004 Chemistry Transition Elements Assertion Reason Question
Assertion : The free gaseous Cr atom has six unpaired electrons.
Reason : Half-filled s orbital has greater stability.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Correct Answer
Detailed Explanation
z1Cr → [Ar] 3d4 4s2, Cr → [Ar] 3d5 4s1, Full-filled s-orbital has greater stability.
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