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Theorizes atoms are composed of indivisible elements shaped like triangles. -
Believed atoms were solid, hard and incompressible and moved throughout space -
Created by Nicolaus Copernicus in 1543, he corrected past theories stating the sun is the center of our solar system. -
Believed everything was made of very tiny particles known as atoms. -
Grounded the law of conservation of mass explaining how matter was conserved. -
Created by John Dalton in the early 1800s, he thought atoms were small, hard spheres with no internal parts. -
Stated that all matter is made of atoms, which are indivisible. -
States equal volumes of gases at the same temperature and pressure contains same number of particles -
States that elements are arranged according to atomic weights. -
Says all atoms contain negatively charged subatomic particles, or electrons -
Suggested that rays that gave off polonium and radium were particles from tiny atoms -
Created by J.J. Thomson in 1904, it shows his discovery of the electron. -
States that any liquid is made up of molecules. -
Millikan made the discovery that all electrons carry the same amount of negative charge. -
Described atoms as having a tiny dense and positively charged core called the nucleus. -
Proposed a theory for the hydrogen atom based on quantum theory that states physical quantities take discrete values -
stated that the frequencies are proportional to the squares of whole numbers that are equal to the atomic number plus a constant. -
Believes the behavior of electrons in atoms could be explained mathematically. -
Erwin Schrodinger created this model in 1926. It consisted of a dense nucleus surrounded by a cloud of electrons at various levels in orbitals. -
Proved the existence of neutrons. -
Believed all metals were formed from mercury and sulfur.