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They created a scientific process which would allow for the eventual discovery of the atom. https://scienceworld.wolfram.com/biography/Alchemists.html -
He found that the fifth atomic type must exist. http://abyss.uoregon.edu/~js/glossary/plato.html -
He found the atom and came up with the name. https://plato.stanford.edu/entries/democritus/ -
He found the volume of a gas decreases with increasing pressure. https://www.sciencehistory.org/historical-profile/robert-boyle -
He found the total mass of products and reactants in chemical reactions. https://www.britannica.com/biography/Antoine-Lavoisier -
Because Dalton thought atoms were the smallest particles of matter, he envisioned them as solid, hard spheres, like billiard (pool) balls, so he used wooden balls to model them. https://flexbooks.ck12.org/cbook/ck-12-middl
e-school-physical-science-flexbook-2.0/section/3.12/primary/lesson/daltons-
atomic-theory-ms-ps/ -
He found that everything is composed of atoms. https://www.biography.com/scientist/john-dalton -
He found that equal volumes of gas contain equal numbers of molecules. https://www.sciencehistory.org/historical-profile/amedeo-avogadro -
He discovered the periodic classification of the chemical elements. https://www.famousscientists.org/dmitri-mendeleev/ -
Discovered the electron https://www.nobelprize.org/prizes/
physics/1906/thomson/biographica -
The discovery of two new elements, radium and polonium. https://www.britannica.com/science/atom/Discovery-of-radioactivity -
The plum pudding model has electrons surrounded by a volume of positive charge. https://www.universetoday.com/38326/plum-pudding-model/ -
He mathematically proved the existence of atoms. https://www.ans.org/news/article-969/albert-einstein-and-the-most-elemental-atomic-theory/ -
He discovered there is a fundamental electron charge. https://courses.lumenlearning.com/chemistry
formajors/chapter/evolution-of-atomic-theory/ -
He discovered that the atom is mostly empty space. https://www.nobelprize.org/prizes/chemistry/
1908/rutherford/biographical/ -
He proposed the theory for the hydrogen atom. datehttp://abyss.uoregon.edu/~js/glossary/bohr_atom.html -
The "solar system" model describes an atom as a central massive positive entity (the nucleus/sun) and, orbiting around it, the negative entities (the electrons/planets). https://socratic.org/questions/what-is-the-
problem-with-a-solar-system-
model-of-the-atom -
He concluded that the atomic number of positive charges in the nucleus. https://www.britannica.com/biography/Henry-Moseley -
He studied the behavior of electrons within atoms. https://www.britannica.com/biography/Erwin-Schrodinger -
The electron cloud model says that we cannot know exactly where an electron is at any given time, but the electrons are more likely to be in specific areas. https://www.nuclear-power.com/nuclear-
power/reactor-physics/atomic-nuclear-physics
/fundamental-particles/what-is-electron-
properties-of-electron/electron-cloud/ -
He discovered the uncertainty principle. -
He discovered that atoms have neutrons too. http://www.abcte.org/files/previews/chemistry/s1_p6.html