Answer:
Hydrogen resembles alkali metals
on account of similarity in the electronic configuration. Like the alkali
metals, hydrogen has only one electron in the outer shell.
Element Electronic
configuration
Hydrogen 1 or \[1{{s}^{1}}\]
Lithium 2, 1 or \[1{{s}^{2}},2{{s}^{1}}\]
Sodium 2, 8, 1 or \[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}}3{{s}^{1}}\]
Potassium 2, 8, 8, 1 or
\[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}},4{{s}^{1}}\]
Hydrogen like alkali metals, has
the tendency to lose outermost electron to form unipositive cation, i.e., both hydrogen
and alkali metals are electropositive in nature and show mono valency. They act
as reducing agents.
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