Na, Mg and AI are the elements of the same period of Modern Periodic Table having one, two and three valence electrons respectively. Which of these elements; (i) has the largest atomic radius,; (ii) is least reactive? Justify your answer stating reason for each case.(Delhi - 2015)
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- Na has the largest atomic radius as it is the left most element of the three. (We know atomic radius decreases from left to right upto the 17th group across period as effective nuclear charge increases from left to right)
- Al is least reactive as it has the most no. of valence electrons so in order to lose electrons to form cations more ionization energy is required compared to the other two.
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well the above answer is the right one
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