Chapter 5 - The periodic table- part ii (icse board)
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The document discusses the key differences between atomic mass and atomic number, and how the modern periodic table is organized based on atomic number. It provides examples of the electronic configurations and valence electrons of elements in groups 1 and 2, including lithium, sodium, potassium, beryllium, and magnesium. The document also lists several topics covered in the chapter on the periodic table, such as the historical development of the periodic table from Dobereiner's triad to Mendeleev's table and the modern periodic table organized by atomic number.
Chapter 5 - The periodic table- part ii (icse board)
- 1. ICSE Class 9 Chemistry - Chapter 5 The periodic table (PART – II)
- 3. What’s the difference between atomic mass and atomic number?
- 4. 5.5 Atomic number as the basis for Modern Periodic table
- 5. 5.6 The Modern Periodic table
- 11. Electron Configurations of Elements
- 14. Electronic configuration Group 1 1 H 3 Li 11 Na 19 K 1 2, 1 2, 8, 1 2, 8, 8, 1 1 Valence electron Valency = 1
- 15. Group 2 4 Be 12 Mg 20 Ca 2,2 2,8,2 2,8,8,2 2 Valence electron Valency = 2
- 19. •Reasons for the classification of elements •Dobereiner’s Triad •Newlan’ds law of octaves •Mendeleev’s periodic table •Atomic number as the basis for Modern Periodic table •The Modern Periodic table •Types of elements •Merits of The Modern Periodic table •Defects of The Modern Periodic table •General trends in The Modern Periodic table •Alkali metals •Alkaline earth metals •Uses of the periodic table