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Which of the following species will have the largest and the smallest size ? Mg, Mg^(2+) , Al , Al^(3+) |
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Answer» Solution :RADIUS of Mg is maximum and `Al^(3+)` is minium. SIZE of Mg is more and Al is less , because Mg and Al are in same period. In same period we go to left to right atomic radius decreases. So, `Al LT Mg`. Volume of position ions are less than PARENTAL atoms. So , `Mg^(2+) lt Mg " and " Al^(3+) lt Al`. In isoelectroic species, POSITIVE charge increases radius an volume decreases. So, `Al^(+3) lt Mg^(+2)`. `Mg^(+2) ` having Al more nuclear effective charge so, `Mg^(2+) lt Al`. |
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