Chapter 5 • Class 10 Chemistry
Periodic Classification of Elements
Class 10 Chemistry Periodic Classification: Dobereiner triads, Newlands octaves, Mendeleev and the modern periodic table, periodic law and trends in groups and periods on Vidaara.
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1
Early Attempts at Classification
By the early nineteenth century chemists had discovered many elements, and each behaved differently. To make sense of this growing list, scientists lo…
Start this topic → 2The Modern Periodic Table & Periodic Law
Mendeleev's table had a few stubborn problems reversed mass orders, isotopes and the position of hydrogen. The fix came when scientists realised that …
Start this topic → 3Trends in the Modern Periodic Table
The real beauty of the periodic table is that an element's position lets you predict its properties . As you move across a period or down a group, pro…
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