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410
Democritus
The Greek philosopher, Democritus, came up with the idea that if a matter is cut up into pieces, you would end up with particles. -
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Aristotle
Aristole believed in his own ideas; all matters were made up of five elements: fire, water, earth air and aither. His theory was used for about 2000 years until a scientific solution came along. -
Robert Boyle
Robert Boyle was able prove that elements are the basic constituents of material bodies. Also, he came up with a way to distinguish mixtures and compounds and be able to detect their ingredients. -
Isaac Newton
Isaac Newton worked in the field of optics; his research became successful and created Newton's Theory of Color. -
Joseph Louis Proust
Joseph Louis Proust created the 'law of definite proportions'. It states that all pure substance are made up of the same elements combined in the same proportions by weight. -
Joseph Priestly
Joseph Priestly was the founder of an important element, oxygen. -
John Dalton
John Dalton was able to figure out that all atoms were small spheres with different properties such as size colour and mass. -
Dmitri Mendeleev
Dmitri Mendeleev created the periodic table that is similar to the modern periodic table, He was able to put all the elements into a certain order and also made sure to leave room in the table for elements yet to be discovered. -
J.J Thomson
J. J Thomson believed that an atom was made up of a combination of particles. In order to test his theory, he used a cathode ray tube and discovered both negatively and positively charged particles known as electrons and protons. -
Niels Bohr
Niels Bohr was able to discover energy levels and how each shell can only hold a specific amount of electrons.
