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Revision Notes
Modern Periodic Table — Revision Notes
Maharashtra Board · Class 11 · Chemistry
Modern Periodic Table revision notes for Maharashtra Board Class 11 Chemistry: 4 topics in quick points. Includes Historical Development and Modern.
45 questions25 flashcards5 concepts
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Key Topics to Revise
1
Historical Development and Modern Periodic Law
- Mendeleev's original periodic table (1869) was based on atomic mass and contained 63 elements
- Mendeleev's Periodic Law: 'Physical and chemical properties of elements are periodic functions of their atomic masses'
- Henry Moseley's X-ray spectroscopy (1913) established atomic number as the fundamental property
2
Structure and Organization of Modern Periodic Table
- 7 horizontal periods numbered 1-7, representing principal quantum number (n) of valence shell
- 18 vertical groups numbered 1-18, elements in same group have similar outer electronic configuration
- Period 1: 2 elements (H, He) - filling 1s orbital
3
Electronic Configuration and Periodic Table Correlation
- Elements arranged according to aufbau principle: increasing order of atomic number
- Period number corresponds to principal quantum number (n) of outermost shell
- Group number for s and p blocks = number of valence electrons
4
Block-wise Characteristics of Elements
- s-block elements: Low ionization energies, form ionic compounds, highly reactive metals
- p-block elements: Show maximum diversity - metals, metalloids, nonmetals, and noble gases
- d-block elements: Transition metals with variable oxidation states, colored compounds, catalytic properties
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Full NotesKey Concepts
The fundamental principle stating that physicalThe modern periodic table contains 118Element position in the periodic tableThe net positive charge experienced byAtomic radius decreases across a period
Frequently Asked Questions
What are the important topics in Modern Periodic Table for Maharashtra Board Class 11 Chemistry?
Key topics in Modern Periodic Table include Historical Development and Modern Periodic Law, Structure and Organization of Modern Periodic Table, Electronic Configuration and Periodic Table Correlation, Block-wise Characteristics of Elements. Study these first, then practise questions on each for Class 11 exams.
How should I revise Modern Periodic Table for Class 11 exams?
Learn the core ideas first, then work through the 45 practice questions on Modern Periodic Table. 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.
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