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JEE Main Chemistry question

ChemistryCoordination CompoundsJEE Main

How many of the following metals show a tendency to form complex ions? Li, Be, Na, Mg, K, Ca

Answer: 2

Solution

Among these, only (via its diagonal relationship with Mg, giving it unusually small size/high charge density for an alkali metal) and (the smallest, most highly charge-dense Group 2 cation, forming

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Question ID VK-138149