Na mg and al are the elements of the 3rd period of the modern periodic table having group number 1,2and13 respectively. Which one of these elements hasthe higest valency and largest atomic radius and muximum reactivity
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the element with highest valency is Al because of valency +3
the element with highest atomic radius is Na because atomic radius decreases in a period from left to right and Al has least atomic radius
Na has max reactivity because it is a alkali metal.
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