The Fascinating Evolution of Atomic Models

🔬The study of atomic models began with Democritus' concept of a round sphere with no electrons, protons or neutrons.

🌍Aristotle introduced the idea of the four elements and believed that the element was the smallest unit of matter.

✨John Dalton proposed his modern atomic theory, stating that matter is made up of indivisible and indestructible atoms.

🍊J.J. Thompson discovered the electron and presented the plum pudding model of the atom.

🎯Ernest Rutherford's gold foil experiment led to the discovery of the atomic nucleus and the development of the Rutherford model.

Who proposed the first atomic model?

—The first atomic model was proposed by Democritus in 400 BC.

What was John Dalton's contribution?

—John Dalton proposed his modern atomic theory, stating that matter is made up of indivisible and indestructible atoms.

What did J.J. Thompson discover?

—J.J. Thompson discovered the electron and presented the plum pudding model of the atom.

What did Ernest Rutherford discover in his gold foil experiment?

—Ernest Rutherford discovered the atomic nucleus and developed the Rutherford model of the atom.

What is the modern atomic theory?

—The modern atomic theory states that atoms of one element are the same, while atoms of different elements are different. It also includes the concept of isotopes.

00:00The study of atomic models began with Democritus' concept of a round sphere with no electrons, protons or neutrons.

01:19John Dalton proposed his modern atomic theory, stating that matter is made up of indivisible and indestructible atoms.

02:26J.J. Thompson discovered the electron and presented the plum pudding model of the atom.

02:58Ernest Rutherford's gold foil experiment led to the discovery of the atomic nucleus and the development of the Rutherford model.

04:12Niels Bohr presented a picture of atomic structure based on Rutherford's discovery of the atomic nucleus.

04:57Erwin Schrodinger developed a mathematical model for the distribution of electrons in an atom.

05:45Werner Heisenberg laid the foundations of quantum mechanics and introduced the cloud model of the atom.

06:32James Chadwick discovered the existence of neutrons.