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450
Democritus
he thought that the atom DID exist. He knew that u could keep cutting an object till it became an atom, then uncuttable -
Jun 12, 1200
Albertus Magnus
Arsenic is a chemical element with symbol As and atomic number 33. Arsenic occurs in many minerals -
Aristotle
Air- primarily wet, secondarily hot.
Fire- primarily hot, secondarily dry
Earth- primarily dry, secondarily cold
Water-primarily cold, secondarily wet. -
Robert Boyle
is an experimental gas law which describes how the pressure of a gas tends to decrease as the volume of a gas increases. -
Abu Mūsā Jābir ibn Hayyān
) he was the first to make citric acid, acetic acid and tartaric acid a great invention by abu used for many chemical processes
