Question:
A group of atoms can function as a ligand only when ________.
A group of atoms can function as a ligand only when ________.
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A group of atoms can function as a ligand only when ____.
Updated On: Apr 15, 2026
- it is a small molecule
- it has an unshared electron pair
- it is a negatively charged ion
- it is a positively charged ion
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The Correct Option is B
Solution and Explanation
Step 1: Definition
A ligand is a chemical species that donates a pair of electrons to a central metal atom or ion to form a coordinate bond.
Step 2: Requirement
To act as a Lewis base (electron donor), the species must possess at least one lone pair (unshared pair) of electrons.
Step 3: Conclusion
While many ligands are anions or small molecules, the absolute requirement is the presence of an unshared electron pair.
Final Answer: (B)
A ligand is a chemical species that donates a pair of electrons to a central metal atom or ion to form a coordinate bond.
Step 2: Requirement
To act as a Lewis base (electron donor), the species must possess at least one lone pair (unshared pair) of electrons.
Step 3: Conclusion
While many ligands are anions or small molecules, the absolute requirement is the presence of an unshared electron pair.
Final Answer: (B)
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