d-block and f-block Elements
Kerala Board · Class 12 · Chemistry
Summary of d-block and f-block Elements for Kerala Board Class 12 Chemistry. Key concepts, important points, and chapter overview.
Overview
The d-block and f-block elements occupy a unique position in the periodic table, bridging the gap between highly electropositive s-block elements and less electropositive p-block elements. These elements, also known as transition elements (d-block) and inner transition elements (f-block), exhibit re
Key Concepts
Transition elements are defined as elements
Transition elements are defined as elements with partially filled d-subshells in atomic or ionic state. General electronic configuration: (n-1)d¹⁻¹⁰ns
Transition elements exhibit multiple oxidation states
Transition elements exhibit multiple oxidation states due to small energy difference between (n-1)d and ns orbitals. Common oxidation states range fro
Magnetic moment μ = √n(n+2) B
Magnetic moment μ = √n(n+2) B.M., where n = number of unpaired electrons. Paramagnetic substances are attracted to magnetic fields due to unpaired ele
Transition metal compounds are colored due
Transition metal compounds are colored due to d-d electronic transitions. When white light interacts with compounds, certain wavelengths are absorbed,
Transition elements act as excellent catalysts
Transition elements act as excellent catalysts due to: (1) Variable oxidation states allowing electron transfer, (2) Formation of intermediate compoun
Learning Objectives
- Define transition metals and write their electronic configurations using (n-1)d¹⁻¹⁰ns¹⁻² notation
- Explain characteristic properties: variable oxidation states, magnetic behavior, colored compounds, and complex formation
- Understand trends in atomic radii, ionization enthalpies, and electrode potentials across the 3d series
- Analyze catalytic properties and formation of alloys and interstitial compounds
- Master preparation and properties of K₂Cr₂O₇ from chromite ore with balanced chemical equations
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d-block and f-block Elements covers several key topics that are frequently asked in Kerala Board Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
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Sources & Official References
- Kerala Board of Public Examinations — keralapareekshabhavan.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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