Which one of the following represents the electronic
configuration of the most electropositive element ?
(a) [He] 2s¹ (b) [Xe] 6s¹
(c) [He] 2s² (d) [Xe] 6s²
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The electronic configuration [Xe]6s1 is the configuration of Cs which is highly electropositive element of alkali metal family. It has the lowest ionisation potential in its family.
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