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Chapter Summary

The d-and f-Block Elements

CBSE · Class 12 · Chemistry

Summary of The d-and f-Block Elements for CBSE Class 12 Chemistry. Key concepts, important points, and chapter overview.

93 questions80 flashcards5 concepts

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A flowchart detailing the industrial preparation of potassium dichromate, starting from chromite ore and involving fusion, acidification, and conversion steps.
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Overview

The d-block contains the elements of Groups 3 to 12 in which d orbitals are progressively filled, while the f-block contains the 4f and 5f series placed separately at the bottom of the periodic table. Transition elements show metallic character, variable oxidation states, coloured ions, complex form

Key Concepts

The d

The d-block occupies the middle of the periodic table and includes four series: 3d, 4d, 5d, and 6d. The f-block contains the lanthanoids, 4f series fr

Transition metals are metals with

Transition metals are metals with an incomplete d subshell in the neutral atom or in one of their ions. Scandium is a transition element because its g

The general outer configuration is (n

The general outer configuration is (n-1)d1-10ns1-2, but chromium has 3d5 4s1, copper has 3d10 4s1, and palladium has 4d10 5s0. These exceptions occur

Transition metals are hard

Transition metals are hard, lustrous, dense, and have high melting and boiling points. Melting points generally rise to a maximum near the middle of t

Ionisation enthalpies increase across a series

Ionisation enthalpies increase across a series, but not smoothly. Exchange energy, d5 stability, and subshell stability cause irregularities. Mn+ and

Learning Objectives

  • Understand the position of d- and f-block elements in the periodic table.
  • Identify the electronic configurations of transition and inner transition elements.
  • Explain why some elements are transition elements and others are not.
  • Relate oxidation states and electrode potentials to stability and reactivity.
  • Describe the preparation, properties, and uses of potassium dichromate and potassium permanganate.

Frequently Asked Questions

What are the important topics in The d-and f-Block Elements for CBSE Class 12 Chemistry?
Key topics in The d-and f-Block Elements include Complete Concept Map: d- and f-Block Elements, Overview of d-Block Transition Elements — Key Characteristics, Is It a Transition Metal? — Decision Flowchart. These are the concepts CBSE Class 12 examiners draw on most — study them first, then practise related questions.
How to score full marks in The d-and f-Block Elements — CBSE Class 12 Chemistry?
Understand the core concepts first, then work through the 93 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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