Transition and Inner transition Elements — Chapter Summary
Maharashtra Board · Class 12 · Chemistry
Summary of Transition and Inner transition Elements for Maharashtra Board Class 12 Chemistry. Part of the Maharashtra Board Class 12 Chemistry syllabus.
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Overview
Transition and inner transition elements form the heart of the periodic table, comprising d-block and f-block elements respectively. These elements exhibit unique properties like variable oxidation states, colored compounds, magnetic behavior, and catalytic activity due to the presence of unpaired d
Key Concepts
Transition elements have (n
Transition elements have (n-1)d¹⁻¹⁰ns¹⁻² configuration. IUPAC defines transition metals as having incomplete d-subshells in atom or common oxidation s
Transition elements show multiple oxidation states
Transition elements show multiple oxidation states due to involvement of both (n-1)d and ns electrons in bonding. Maximum oxidation states occur in mi
Paramagnetism arises from unpaired electrons
Paramagnetism arises from unpaired electrons. Magnetic moment μ = √n(n+2) BM, where n = number of unpaired electrons. Fe, Co, Ni are ferromagnetic. Di
Colored compounds result from d
Colored compounds result from d-d electronic transitions when d-orbitals split in different energy levels due to ligand field. Energy required corresp
Transition metals act as excellent catalysts
Transition metals act as excellent catalysts due to: (1) Variable oxidation states allowing redox cycles, (2) Ability to form intermediate compounds,
Learning Objectives
- Understand the position and electronic configuration of d-block and f-block elements in the periodic table
- Explain trends in atomic properties like atomic radii, ionization enthalpy, and oxidation states
- Analyze physical properties including magnetic behavior, color, and catalytic activity
- Study important compounds of chromium and manganese with their preparation and reactions
- Learn the extraction of iron from its ore using blast furnace technology
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Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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