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460 BCE
Theory of Atoms is created
Democritus described that matter is made from tiny building blocks -
John Dalton
He found that atoms of same substances are the same and that mixtures of the diferent atoms make up compounds. -
classifying atoms
Dmitry Mendeleyev and Lothar Meyer discovered that elements had different types of atoms. This classification was the begining of the periodic table. -
Experiments proved atom existence
Sir Joseph Jon Thompson and others did experiments with electricity, proved that atoms existed. -
Model of atoms designed
Ernest Rutheford and Niels Bohr designed a model that included protons and nucleus. -
4 new atoms discovered
in 2016 4 new types of atoms were found. These were the last discoveries of new atoms