What is diagonal relationship? Account for similarily between lithium and magnesium
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A diagonal relationship is said to exist between certain pairs of diagonally adjacent elements in the second and third periods (first 20 elements) of the periodic table.
Both lithium and magnesium are harder lighter than other elements in the respective groups.
Lithium and magnesium react slowly with water. Their oxides and hydroxides are much less soluble and their hydroxides decompose on heating.
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Some elements in second period elements resemble third period elements in their properties. This is known as diagonal relationship.
Similarities between Lithium and magnesium
•they are hard metals
•Lithium and magnesium form nitrides
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