Study Chapter Details
UP Board Class 11 Chemistry – Structure of Atom
The chapter Structure of Atom helps students understand how atoms are built and how their internal structure determines chemical behavior. It explains the fundamental particles of an atom—electrons, protons, and neutrons—and how they were discovered through various experiments.
The chapter begins with key historical models such as Thomson’s atomic model, Rutherford’s nuclear model, and Bohr’s model of the hydrogen atom, each contributing to our modern understanding of atomic structure. Students also learn about important concepts like atomic number, mass number, isotopes, isobars, and ions.
A major part of this chapter explains the nature of electromagnetic radiation, Bohr’s theory, quantum mechanical model, and the dual nature of matter. Concepts such as orbitals, quantum numbers (n, l, m, s), and electronic configuration show how electrons are arranged within an atom and how these arrangements affect the properties of elements.
