Hydrogen resembles halogen in many respects for which several factors are responsible. Of the following factors which one is the most important in this respect?
Its tendency to lose electron
Its tendency to gain electron in its valence shell
Its low negative electron gain enthalpy
Its small size
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Correct option is B)
Halogens like hydrogen are highly electronegative in nature as it has the tendency to form anion by the gain of one electron in its valence shell. Similarly hydrogen has one electron in its only s-orbital which can accommodate only one electron to form hydride anion like halogens.