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Periodic Properties and Variations of Properties - Physical and Chemical

ICSE · Class 10 · Chemistry

Quick revision notes for Periodic Properties and Variations of Properties - Physical and Chemical — ICSE Class 10 Chemistry. Key concepts, formulas, and definitions for last-minute revision.

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A comprehensive labeled diagram of the modern long-form periodic table, clearly showing the s, p, d, and f blocks, numbered periods (1-7), and numbered groups (1-18).
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Key Topics to Revise

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1. Modern Periodic Table and Periodicity

  • The modern periodic table arranges elements in increasing order of atomic numbers.
  • The modern periodic table has seven periods and eighteen groups.
  • Elements with similar properties appear in the same group because their outer electronic configurations are similar.
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2. Classification of Elements

  • Noble gases are Group 18 elements with completely filled shells: He, Ne, Ar, Kr, Xe and Rn.
  • Noble gases are practically unreactive under normal conditions because they have stable electronic configurations.
  • Representative elements include groups 1, 2, 13, 14, 15, 16, 17 and 18.
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3. Atomic Size or Atomic Radius

  • Atomic size or atomic radius is the distance from the centre of the nucleus to the outermost shell of electrons.
  • Atomic radius can be expressed in Angstrom unit or in picometres.
  • Å = 10^-8 cm = 10^-10 m.
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4. Ionisation Energy and Ionisation Potential

  • Ionisation energy is the minimum amount of energy required to remove the most loosely bound electron from an isolated gaseous atom to form a cation.
  • Ionisation energy is expressed in kJ/mol or eV/atom.
  • Ionisation potential is the same quantity as ionisation energy but expressed in eV.

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Full Notes

Key Concepts

The physical and chemical propertiesThe physical and chemical propertiesThe periodic repetition of elements havingNoble gases belong to group 18Atomic size or atomic radius

Frequently Asked Questions

What are the important topics in Periodic Properties and Variations of Properties - Physical and Chemical for ICSE Class 10 Chemistry?
Key topics in Periodic Properties and Variations of Properties - Physical and Chemical include Correct vs Incorrect Thinking: Periodic Trends in a Period, Periodic Properties — Complete Overview, Periodic Properties — Complete Overview. These are the concepts ICSE Class 10 examiners draw on most — study them first, then practise related questions.
How to score full marks in Periodic Properties and Variations of Properties - Physical and Chemical — ICSE Class 10 Chemistry?
Understand the core concepts first, then work through the 43 practice questions available for this chapter. Revise formulas and 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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