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प्रश्न
Lithium resembles magnesium in some of its properties. Mention two such properties and give reasons for this resemblance.
उत्तर
(i) Both Li and Mg are harder and lighter than other elements in their groups.
(ii) Both form ionic nitrides Li3N and Mg3N2 by heating in an atmosphere of nitrogen. Li resembles Mg due to similar atomic radii and ionic radii.
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