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Explain why size of cation is smaller than of the parent atom. |
Answer» Solution :CATION is formed by the ion of one of more election from the gaseous atom . Now in CAT ion the NUCLEAR charge remains the same as that in the parent atom but the number of ELECTRONS becomes less . As a result of these , the nucleus hold on the remaining elections INCREASE because of the increase in the effective nuclear change per electron.Thus causes decrease in size , Ex: The relative size of sodium atom and sodium ion is as follows : 
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