Structure of Atom Class 11 | Lec-04 | Atomic Number, Mass Number, Isotopes, Isobars & Models of Atom скачать в хорошем качестве

Structure of Atom Class 11 | Lec-04 | Atomic Number, Mass Number, Isotopes, Isobars & Models of Atom

In this lecture Atomic Structure – Lecture 04, we study the core concepts of atomic structure as per NCERT Class 11 Chemistry. This session is very important for Board exams, NEET & JEE. 📌 Topics covered in this video : Models of atom ( J. J. Thomson, Ernest Rutherford, Niels Bohr ) Max Planck – Quantum Theory Louis de Broglie Hypothesis Werner Heisenberg Uncertainty Principle Atomic Number (Z) & Mass Number (A) Symbolic representation of elements Isotopes (H, C, Cl examples) Isobars, Isotones & Isoelectronic species Numerical problems with step-by-step solutions (NCERT type) 📘 This lecture is very useful for Class 11 students, especially those preparing for NEET / JEE / Board Exams. 👉 Watch till the end for important numerical questions and exam-oriented concepts. 📢 Like | Share | Subscribe to Varnwal Chemistry Education for more such lectures. 00:00 – 03:00 ▶ Introduction of Atomic Structure & lecture overview 03:00 – 10:00 ▶ Thomson’s Model of Atom (basic idea & limitations) 10:00 – 20:00 ▶ Rutherford’s Model of Atom • Alpha particle scattering experiment • Why heavy atoms are used 20:00 – 30:00 ▶ Bohr’s Model of Atom (postulates overview) 30:00 – 35:00 ▶ Planck’s Quantum Theory (energy packets concept) 35:00 – 40:00 ▶ de Broglie’s Hypothesis (dual nature of matter) 40:00 – 45:00 ▶ Heisenberg’s Uncertainty Principle 45:00 – 52:00 ▶ Atomic Number (Z) & Mass Number (A) • Relation: A = Z + n 52:00 – 57:00 ▶ Symbolic representation of elements 57:00 – 1:05:00 ▶ Isotopes • Hydrogen isotopes • Carbon & Chlorine examples 1:05:00 – 1:12:00 ▶ Isobars, Isotones & Isoelectronic species (with tables) 1:12:00 – 1:23:00 ▶ Numerical Questions & NCERT-type problems • Protons, neutrons & electrons calculation • Writing correct atomic symbols #AtomicStructure #Class11Chemistry #NCERTChemistry #Isotopes #Isobars #Isotones #BohrModel #NEETChemistry #JEEChemistry #VarnwalChemistry