Who stated the atom was a single small particle that was indivisible?
The first person to suggest matter was made up of small indivisible particles would be Democritus, who coined the name atoms. But the person who stated that atoms were indivisible particles in modern time would be John Dalton, who stated that all matter is made up of atoms.
He proposed a theory that stated if you cut matter in half and then cut those halves in half again, eventually you end up with an "uncuttable particle" He called this atomos which is Greek for indivisible. He said that all atoms were small, hard particles made up of a single material formed into different shapes and sizes. Atoms are always moving and form different materials by joining together. Hope this helped :)
No, he theorized that there was a small indivisible particle (he called the "atom" because it means indivisible), but he never did any experiments to prove his theory. Around the same time, Aristotle believed that matter could be divided infinitely. Both were considered speculation until the eighteenth century.
No. Atoms consis of protons, electrons and neutrons which consist of quarks and whole bunch of subatomic particles. ANSWER: The Greek word for indivisible is atom. It is rich with irony and even somewhat predictable that by naming something that small indivisible, it was only a matter of time before someone rose to the challenge.
Particles/molecules/atoms = same thing. A particle is a term used for any single small thing. It could be an individual atom, a small molecule of water or something as big as dust or sand. A molecule just means that there are two or more atoms chemically bonded together. So all molecules are particles and particles definitely can be molecules!