- Dr.Sanjaykumar Pawar Electromagnetic Radiation for NEET: Complete NCERT Notes, Formulas & Questions Electromagnetic spectrum showing wavelength, frequency, visible light region, and important chemistry formulas for NEET preparation. Internal Links Structure of Atom Notes Dual Nature of Matter and Radiation Photoelectric Effect Explained Atomic Models Bohr's Atomic Theory Quantum Mechanical Model of Atom Planck Quantum Theory Wave Nature of Light Hydrogen Spectrum Mole Concept Atomic Structure MCQs NEET Physical Chemistry Notes NCERT Chemistry Class 11 Notes Chemistry Formula Handbook Chemistry Previous Year Questions Chemistry Mock Tests What is Electromagnetic Radiation? Electromagnetic Radiation (EMR) is a form of energy that travels through space in the form of electromagnetic waves. These waves are produced whenever an electrically charged particle accelerates. Unlike sound waves, electromagnetic waves do not require a materi...
Laws of Chemical Combinations Class 11 CBSE Notes with MCQs and Answers Laws of Chemical Combinations – Complete CBSE Class 11 Chemistry Notes with MCQs, Case Studies, and Exam Questions. - Dr.Sanjaykumar Pawar Laws of Chemical Combinations (NEET Notes) 📖 Introduction The Laws of Chemical Combinations explain how elements combine to form compounds . These laws are the foundation of chemistry and are very important for the NEET examination . 1. Law of Conservation of Mass Statement During any physical change or chemical reaction , the total mass remains constant . Matter can neither be created nor destroyed. Formula Mass of Reactants = Mass of Products Example Hydrogen + Oxygen → Water 2 g Hydrogen + 16 g Oxygen = 18 g Water Total mass before reaction = 18 g Total mass after reaction = 18 g Hence, mass is conserved. Key Points Proposed by Antoine Lavoisier (1789) . Applicable to both physical and chemical changes. Atoms only rearrange; they ar...