STRUCTURE OF ATOM in One Shot - From Zero to Hero || Class 9th
Physics Wallah Foundation・2 minutes read
Chemistry teacher Senanayak introduces students to the Structure of Atom chapter, covering Dalton's Atomic Theory, Thomson's experiment, Rutherford's model, Bohr's model, electron configuration rules, valency, isotopes, and practical applications. The text also explores the concept of atomic mass, isotopes with varying mass numbers like chlorine 35 and 37, fractional atomic mass calculations, and the differences between isotopes and isobars, providing insights into their chemical and physical properties.
Insights
- Dalton's Atomic Theory initially proposed indivisible atoms but later research revealed atoms as divisible, composed of electrons, protons, and neutrons with specific masses and charges.
- Rutherford's Alpha Particle Scattering Experiment showed atoms as mostly empty space with a dense, positively charged nucleus, leading to the model of electrons orbiting the nucleus like planets around the sun.
- Bohr's Model of the Atom introduced stable electron orbits with fixed energy levels, emphasizing that electrons in discrete orbits do not lose energy, contributing to atomic stability and electron arrangement in shells for stability and valency determination.
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Recent questions
What did Rutherford's experiment reveal about the atom?
Most of the atom is empty space.
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