Transition and Inner transition Elements
Maharashtra Board · Class 12 · Chemistry
Summary of Transition and Inner transition Elements for Maharashtra Board Class 12 Chemistry. Key concepts, important points, and chapter overview.
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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