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The relationship between Li, Mg and Be, Al is called the __________ relationship.

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in Chemistry – Class 11 by (148k points)
The relationship between Li, Mg and Be, Al is called the __________  relationship.

(a) Diagonal

(b) Periodic

(c) Group

(d) Triangle

I have been asked this question in a national level competition.

I'm obligated to ask this question of Periodic Trends in Properties of Elements topic in section Classification of Elements and Periodicity in Properties of Chemistry – Class 11

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Right option is (a) Diagonal

Explanation: The Elements Li and Mg, Be and Al are similar to each other in the case of formation of different compounds in a similar composition. They have a sort of similar behaviour with each other, so they are said to be in a diagonal relationship as per their place in the periodic table.

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