Arrange the positive ions in the increasing order of valency (top to bottom).

Calcium

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Aluminium

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Lithium

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Lead [IV]

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Solution

The valency of lithium is 1, that of calcium is 2 and of aluminium is 3. Lead exhibits variable valencies but since it is denoted as lead[IV], its valency is 4.

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Arrange the following elements in increasing order of their valency.

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