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- said everything is composed of atoms
- imaged the fisrt sight of an atom
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- ideal geometric forms seve as atoms
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- discovered the electron
- all matter is made of a particle smaller than an atom
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- treated metal and ores to try and create gold
- created a scientific theory that would be used to discover an atom
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- created a theory that matter is composed of tiny particles
- exposed chemical changes
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- suggested that all matter is made of tiny particles called atoms
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- contributed to the atomic theory that elemental gasses have equal number of molecules and are made of two elements
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- made the first periodic table
- discovered elements not yet found in the wild
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- Conducted experiments with radiology and discovered palomuim and Raduim.
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- math proved the existence of atoms and their random motion
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- figured out the charge of an electron
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- reacherched atomic and nuclear physics
- added scientific ideas about atoms
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- atomic theory states that an atom is like a planetery model because it orbits the center.
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- discovered the atomic number of the elements.
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- discovered neutrons