Greek philosopher Democritus is alive around this time (1 gen 460 anni a. C. – 1 gen 370 anni a. C.)

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Democritus, an ancient Greek philosopher, proposed the concept of the atom as the smallest indivisible particle that makes up all matter. He believed that atoms are constantly in motion and come in different shapes and sizes, which determine the properties of different substances. Democritus' ideas laid the foundation for modern atomic theory, influencing scientists like John Dalton and leading to our current understanding of the atom as the basic building block of all matter.

Democritus did not perform experiments on atoms, as he lived in ancient Greece around 400 BC when technology for such experiments did not exist. Instead, he proposed the idea of atoms as indivisible particles that make up all matter based on philosophical reasoning. Democritus believed that atoms were constantly in motion and varied in shape and size, forming different substances when they combined in different ways. His ideas laid the foundation for modern atomic theory.

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