John dalton atomic theory project ideas

Posted on Jan 17, 2025 in Chemistry

Evolution of the Atomic Theory

5th Century BC: Leucippus and Democritus

Leucippus and his pupil Democritus proposed the idea that matter consisted of tiny, indivisible particles called atoms. These ideas were opposed by one of the greatest thinkers of that time, Aristotle. It was only after two millennia that the idea of the atom as a fundamental component of matter was taken up again.

1808: John Dalton’s Atomic Theory

John Dalton proposed the Atomic Theory, which revived and gave scientific value to the term “atom.” According to Dalton, the atom was a solid sphere. The basic tenets of this theory are:

1. Matter consists of indivisible and indestructible particles: atoms.
2. All atoms of an element are identical.
3. Atoms of different elements have different masses and properties.
4. Atoms are neither created nor destroyed; in a chemical reaction, only a redistribu