17 something?
Atoms make all things.
democritus
The idea that matter is made up of atoms was proposed by the ancient Greek philosopher Democritus around 400 BCE. He believed that all matter consists of tiny, indivisible particles called atoms.
Democritus discovered how to describe invisible atoms as the basics of all matter.
To Democritus the atom looked like a marble. Democritus theorized that matter could only broken down into pieces of a certain size. These pieces which could not be broken any further were called atoms.
The idea that all things are made of tiny indivisible particles called atoms was first suggested by the ancient Greek philosopher Democritus around 400 BC. He proposed that these atoms are in constant motion and combine in different ways to form all matter in the universe.
Democritus believed that matter is made of tiny indivisible particles called atoms. He believed that the atoms have always been, and always will be, in motion; that there are an infinite number of atoms, and kinds of atoms, which differ in shape, and size.
Democritus and his teacher Leucippus believed several things about atoms. They believed that atoms were homogeneous, that solids were made of atoms, that liquids were made of large atoms, and that sour things were made of sharp atoms.
That all matters are made up of atoms
In my textbook it sayes that actually Dalton believed that all substances are made of atoms, and this was part of his atomic theory, which he published in 1803.
The first person to state that matter is made up of atoms was the ancient Greek philosopher Democritus in the 5th century BC. He proposed that all matter is composed of indivisible particles called atoms.
Democritus proposed that all matter is made up atoms and he coined the term "atomos", or atoms, which means indivisible. He claimed atoms could not be destroyed and that matter would remain the same, even if it is sliced into the smallest possible quantity.