The chemistry of lithium is very similar to t | vedclass

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(D) $Diagonal \ Relationship$ exists between certain pairs of diagonally adjacent elements in the second and third periods of the periodic table. Thes

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The ratio of their charge to size is nearly the same

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(D) $Diagonal \ Relationship$ exists between certain pairs of diagonally adjacent elements in the second and third periods of the periodic table. These pairs ($Li$ and $Mg$,$Be$ and $Al$,$B$ and $Si$,etc.) exhibit similar properties.Such a relationship occurs because crossing and descending the periodic table have opposing effects on atomic properties. On crossing a period,the size of the atoms decreases,and on descending a group,the size of the atoms increases.Specifically,the chemistry of $Li$ and $Mg$ is similar because the ratio of their charge to size (ionic potential) is nearly the same,which leads to similar polarizing power and chemical behavior.

The chemistry of lithium is very similar to that of magnesium even though they are placed in different groups. Why?

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