Chapter 8 of 16
Revision Notes
Transition and Inner transition Elements — Revision Notes
Maharashtra Board · Class 12 · Chemistry
Transition and Inner transition Elements revision notes for Maharashtra Board Class 12 Chemistry: 4 topics in quick points.
44 questions22 flashcards5 concepts
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Key Topics to Revise
1
Position and Electronic Configuration
- Transition elements: Groups 3-12, periods 4-7 with general configuration (n-1)d¹⁻¹⁰ns¹⁻²
- Four series: 3d (Sc to Zn), 4d (Y to Cd), 5d (La to Hg), 6d (Ac to Cn)
- Chromium anomaly: [Ar]3d⁵4s¹ instead of [Ar]3d⁴4s² (half-filled stability)
2
Physical and Chemical Properties
- Physical: Hard, lustrous, high melting/boiling points, good conductors, metallic character
- Atomic radii decrease gradually across period due to increasing nuclear charge
- Ionization enthalpies increase gradually across period, intermediate between s and p blocks
3
Color and Magnetic Properties
- Colored compounds due to d-d transitions absorbing visible light
- Color depends on: number of unpaired electrons, ligands, geometry
- Colorless ions: d⁰ (Sc³⁺, Ti⁴⁺) and d¹⁰ (Cu⁺, Zn²⁺) configurations
4
Catalytic Properties and Applications
- Excellent catalysts due to variable oxidation states and vacant d-orbitals
- Homogeneous catalysis: same phase as reactants
- Heterogeneous catalysis: different phase, provides reaction surface
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Full NotesKey Concepts
Transition elements have (nTransition elements show multiple oxidation statesParamagnetism arises from unpaired electronsColored compounds result from dTransition metals act as excellent catalysts
Frequently Asked Questions
What are the important topics in Transition and Inner transition Elements for Maharashtra Board Class 12 Chemistry?
Key topics in Transition and Inner transition Elements include Position and Electronic Configuration, Physical and Chemical Properties, Color and Magnetic Properties, Catalytic Properties and Applications. Study these first, then practise questions on each for the Maharashtra Board Class 12 board exam.
How should I revise Transition and Inner transition Elements for the Maharashtra Board Class 12 board exam?
Learn the core ideas first, then work through the 44 practice questions on Transition and Inner transition Elements. Revise definitions regularly and use flashcards for quick recall before the exam.
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Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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