Question

Na, Mg, Al are the elements of 3rd Period of the modern periodic table having group number 12 13 respectively with these elements has the highest valency largest atomic radius and maximum chemical reactivity justify your answer giving reason for it

Answer 1

Al has the highest valency which is 3.largest atomic radius is of Na because it has only 1 electron in its outermost shell Beca of less force of attraction between nucleus and electron is there.Na is more reactive as it's valency is the least which is 1 because of which it can easily lose electrons and react with other compounds.
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