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Question
Hydrogen resembles halogens in many respects for which several factors are responsible. Of the following factors which one is most important in this respect?
Options
Its tendency to lose an electron to form a cation.
Its tendency to gain a single electron in its valence shell to attain stable electronic configuration.
Its low negative electron gain enthalpy value.
Its small size.
Solution
Its tendency to gain a single electron in its valence shell to attain stable electronic configuration.
Explanation:
Its tendency to gain a single electron in its valence shell to attain stable electronic configuration.
Like halogens (with ns2np5 configuration belonging to the seventeenth group of the periodic table), it is short by one electron to the corresponding noble gas configuration, helium (ls2).
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