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Theories on the Atomic Structure, https://youtu.be/OUoV--CuLDA?si=VhBnh…
Theories on the Atomic Structure
John Dalton
John Dalton's atomic theory, proposed in the early 19th century, laid the foundation for modern chemistry. It proposed that all matter is composed of indivisible particles called atoms, and that atoms of a given element are identical
https://youtu.be/vwUq4EF9hno
Erwin Schrödinger’s atomic theory describes electrons as wave-like particles that move in a cloud around the nucleus. Instead of fixed paths, electrons are found in regions called orbitals, where their location is based on probability.
Erwin Schrödinger
Eugen Goldstein
Eugen Goldstein discovered canal rays, these are positively charged particles inside atoms.
His work showed that atoms are made of both negative (electrons) and positive parts.
This helped other scientists later discover the proton.
He helped prove that atoms are not solid balls, but have smaller parts inside.
https://youtu.be/uVzfQaDWpFA
Niels Bohrs
Niels Bohr proposed a quantized structure for the atom, explaining the spectral lines of hydrogen. It posited that electrons orbit the nucleus in specific, defined energy levels or shells, and can only exist in these stable orbits. Transitions between these orbits involve the absorption or emission of energy in the form of photons. He proposes a model of the atom, picturing it as a miniature solar system where electrons orbit a central nucleus in specific, quantized paths called shells or energy levels.
https://youtu.be/S1LDJUu4nko?si=ROt2ptSzsBbcG1eH
James Chadwick
https://youtu.be/wlBcE1M-jQk
James Chadwick discovered the neutron in 1932.
He found that atoms have neutral particles (neutrons) in the nucleus, along with protons.
Neutrons have no charge but add mass to the atom.
His discovery helped complete the modern model of the atom and made nuclear science possible.
https://youtu.be/OUoV--CuLDA?si=VhBnh-fQdM7hQHQO
