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d-block and f-block Elements — Study Plan

Telangana Open School (TOSS) · Class 12 · Chemistry

A step-by-step study plan for d-block and f-block Elements, Telangana Open School (TOSS) Class 12 Chemistry: what to learn first, what to practise.

50 questions35 flashcards3 formulas & key relations5 concepts

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Study Plan

1
Day 1–2

Learn the Theory

Read the textbook chapter carefully. Note down definitions, formulas and key ideas. Focus on: Transition Elements and Electronic Configuration, Physical and Chemical Properties of Transition Elements, Magnetic and Color Properties.

2
Day 3

Practise

Solve the textbook exercises and extra practice questions. There are 50 questions available for this chapter.

3
Day 4

Revise & Test

Revise key points without looking at your notes. Take a practice quiz and mark weak areas for another pass.

4
Day 7

Spaced Revision

Come back to d-block and f-block Elements after a week. Use flashcards for quick recall and try past exam questions on this chapter.

What to Focus On

  • Transition elements have partially filled d-orbitals in atomic or ionic state.
  • d-block includes groups 3–12; transition elements are a subset.
  • Zinc, cadmium, and mercury are not transition elements due to fully filled d-orbitals in common ions.
  • General configuration: (n–1)d¹⁻¹⁰ ns¹⁻².
  • Cr and Cu show exceptional configurations due to stability of half-filled and fully filled d-orbitals.
  • Ionization removes 4s electrons before 3d electrons.
  • High melting points due to strong interatomic bonding.
  • Atomic radii decrease across the series due to poor shielding by d-electrons.
  • Densities are high and increase across the series.

Common Mistakes to Avoid

All d-block elements are transition elements.

The electronic configuration of Cr is [Ar] 3d⁴ 4s².

During ionization, transition metals lose 3d electrons before 4s electrons.

Memory Tips

Definition of transition elements: partially filled d-orbitals in atom or ion

Electronic configuration exception: Cr is [Ar] 3d⁵ 4s¹, not 3d⁴ 4s²

Cu has configuration [Ar] 3d¹⁰ 4s¹, not 3d⁹ 4s²

Variable oxidation states due to similar energy of ns and (n-1)d orbitals

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Frequently Asked Questions

What are the important topics in d-block and f-block Elements for Telangana Open School (TOSS) Class 12 Chemistry?
Key topics in d-block and f-block Elements include Transition Elements and Electronic Configuration, Physical and Chemical Properties of Transition Elements, Magnetic and Color Properties, Alloy Formation, Interstitial Compounds, and Catalytic Properties. Study these first, then practise questions on each for the Telangana Open School (TOSS) Class 12 board exam.
How should I revise d-block and f-block Elements for the Telangana Open School (TOSS) Class 12 board exam?
Learn the core ideas first, then work through the 50 practice questions on d-block and f-block Elements. Revise 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.

More resources for d-block and f-block Elements

All Telangana Open School (TOSS) Class 12 Chemistry Study Plan

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