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Modern Periodic Table

Maharashtra Board · Class 11 · Chemistry

Complete topic list for Modern Periodic Table in Maharashtra Board Class 11 Chemistry. Key concepts, sub-topics, and what to focus on for board exams.

45 questions25 flashcards5 concepts

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4 Topics · Maharashtra Board Class 11 Chemistry

Topics in Modern Periodic Table

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

Key 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?
Modern Periodic Table covers several key topics that are frequently asked in Maharashtra Board Class 11 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Modern Periodic Table — Maharashtra Board Class 11 Chemistry?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision 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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