Study Chapter Details
UP Board Class 11 Chemistry – Classification of Elements and Periodicity in Properties
The chapter Classification of Elements and Periodicity in Properties helps students understand how elements are arranged in the modern periodic table based on their atomic number and chemical behaviour. This classification makes it easier to study the physical and chemical properties of all known elements.
Students learn about the historical development of the periodic table, including Dobereiner’s Triads, Newlands’ Law of Octaves, and Mendeleev’s Periodic Table. The chapter then explains the Modern Periodic Law, which forms the basis of today’s periodic table.
Important periodic trends such as atomic radius, ionic radius, ionization enthalpy, electron gain enthalpy, electronegativity, and valency are discussed. These trends help in predicting the reactivity, bonding, and stability of elements.
Overall, this chapter builds a strong foundation for understanding chemical bonding, inorganic chemistry, and the behaviour of elements across groups and periods.
