Class 8 | Atomic Structure 02 | Discovery of Proton, Thomson Atomic Model | Pearson

Welcome to the YouTube channel focusing on atomic structure, discussing its historical background and the early theories surrounding atoms. Early philosophers and scientists debated the existence and properties of atoms, setting the stage for modern chemistry with significant experiments such as the cathode ray tube experiments conducted by J.J. Thomson.

The discussion continues on the cathode ray tube experiment, which aimed to uncover invisible particles and led to the evidence of the existence of electrons. Thomson's discoveries emphasized the concept of positive and negative charges within atoms, paving the way for a deeper understanding of atomic structure.

Moving forward, the importance of properties of charged particles is examined, focusing on specific charge values and how they vary across different materials. This leads to the discovery of protons and the need to validate atomic models, indicating that previous assumptions must be revisited based on experimental evidence.

The lecture delves into distinct atomic models proposed by various scientists over time, highlighting Thomson's model as the first significant atomic theory. This model included the idea of a uniform positive charge with electrons embedded within, describing it as a 'watermelon model'.