the periodic table chapter 5 class 9 icse
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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
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