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Q.
Which of the following pair of elements will have least electronegativity difference?
NTA AbhyasNTA Abhyas 2022
Solution:
In the periodic table, the electronegativity decreases down the group. Iodine is a nonmetal with high electronegativity while rest are the alkali metals on which lithium has the highest electronegativity.
Therefore, $Li,I$ give the minimum electronegativity difference.