How the Electron Was Discovered | Dalton to Thomson (Full Story) скачать в хорошем качестве

How the Electron Was Discovered | Dalton to Thomson (Full Story)

How did scientists discover the electron, the first subatomic particle ever identified? Before the late 19th century, atoms were believed to be indivisible, as proposed by John Dalton. However, a series of groundbreaking experiments by several scientists gradually revealed that atoms actually contain smaller particles. In this lecture, we explore the complete historical journey of the discovery of the electron, from early atomic theory to the famous cathode ray experiments. You will learn about the contributions of: 🔬 John Dalton – Early atomic theory ⚡ Michael Faraday – Electricity and gases 🔭 Heinrich Geissler – Geissler discharge tubes 💡 William Crookes – Cathode ray experiments ⚛️ J. J. Thomson – Discovery of the electron and the charge-to-mass ratio 🧪 Robert A. Millikan – Measurement of the electron’s charge using the Oil Drop Experiment By the end of this video, you will understand how these experiments proved that atoms are divisible and contain negatively charged particles called electrons. This lecture is designed for: ✔ College Chemistry Students ✔ General Chemistry Courses ✔ MCAT / Pre-Med Preparation ✔ Anyone learning Atomic Structure