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He laid down the foundation for the periodic table -
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Matter is composed of atoms separated by empty space through which the atoms move -
Atoms shapes were based on regular polygons -
Nicholas Copernicus drew this model to model the atoms -
He made the definition of a element and helped with precise measurements and experiments. -
Total mass=reactants -
He made a version of the atomic theory stating that all atoms were composed of combinations these atoms in defined ratio -
John Dalton made a model with wooden balls showing small atoms in a atom -
He stated that gasses of equal size contain the same number of molecules given that pressure and temperature are the same. -
created periodic table by atomic weight -
They discovered how to isolate radiation and figured out that some elements produce more than others -
He discovers the electron. -
The model was made by JJ Thompson and the model shows that the atom is a sphere of positive charge, and negatively charged electrons are in it to balance the total positive charge. -
Einstein calculated how fast a visible particle would travel in a given time. -
He figured out the value of an electron. -
He was the first one to discover that electrons travel in separate orbits. -
He proved that every element can be identified by how many protons it has. -
He is known for his studies on radioactivity -
The Erwin Shrodinger model showed relative position of electron -
He discoverd the neutron. -
He figured out how to find a electrons position and quantinization of hydrogen atoms.