Diagonal Relationship of Representative Elements | Chemistry Notes for Class 11 & 12 (2025)

Learn about the Diagonal Relationship of Representative Elements with clear notes and examples (Li–Mg, Be–Al). Perfect for Class 11 & 12 Chemistry 2025 exam preparation.

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In this post, we’ll discuss the Diagonal Relationship of Representative Elements — an important topic from the periodic table in Class XI and XII Chemistry. The diagonal relationship explains why certain elements like Lithium and Magnesium or Beryllium and Aluminium show similar chemical properties despite being in different groups. You’ll also learn about the reasons behind this relationship, including similar atomic sizes, polarizing power, and electronegativity. These notes are perfect for quick revision and conceptual understanding for your 2025 Chemistry exams.

Diagonal Relationship of Representative Elements

Lithium and Magnesium Similarities

Beryllium and Aluminium Relationship

Periodic Table Trends in Chemistry

Class 11 and 12 Chemistry Notes 2025

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