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They develop the theory that all metals are made of mercury and sulfur and that it is possible to change base metals into gold.
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His atomic theory anticipated the modern principles of the conservation of energy and the irreducibility of matter.
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Aristotle provided us with knowledge of natural science including Physics, which gives a vast amount of information on astronomy, meteorology, plants, and animals.
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He said that matter was composed of small indivisible particles called atoms.
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he discovered that atoms must exist based on the relationship between pressure and volume of gas.
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the concept of an element as a simple substance that could not be broken down by any known method of chemical analysis.
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His contribution to science was his theory that matter is composed of atoms of differing weights and combine in simple ratios by weight.
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developed the Periodic Law and created the periodic table of elements that is used today.
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He discovered of the electron, the negatively charged particle in the atom. He is known for the Thomson atomic theory.
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They stated that radioactive materials cause atoms to break down spontaneously, releasing radiation in the form of energy and subatomic particles.
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Einstein was known as the creator of the special and general theories of relativity and for his intelligent hypothesis concerning the particle nature of light.
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He created the oil drop experiment that measured an electrons charge.
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He created the theory of the structure of the atom.
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He called the place of an element in the list its atomic number. He concluded that it was the atomic number of the element, not the atomic weight, that decided what the element was.
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He created the model of the atom in which the electron was able to occupy only certain orbits around the nucleus.
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He calculated the behavior of the electrons around the atom with the Uncertainty Principle.
