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Their atomic theory was that particles are always in motion and matter is eternal. He also suggested that particles come in all shapes/sizes. Notable figures in the Alchemists were Isaac Newton and Paraceleus. Source: HealthResearchFunding.org -
He theorized that atoms are very small, indestructible, and separated by pure void. He formulated the idea of an atomic theory. Source: CK12.org -
He theorized that all solid matter is composed of individual shaped like triangles. He was also a philosopher. Source: Thecollector.com -
Copernicus came up with the solar system model. It can represent the Sun being the center of the system, or that the Nucleus is the center of the atom. Source: Google.com -
All matter was composed of tiny particles that he called corpuscles. Also, he can be known as one of the founders of modern chemistry. Source: Google.com -
He theorized that matter was composed of atoms that weren't created or destroyed during chemical reactions. He is also the founder of the elements of oxygen and silicon. Source: PurdueUniversity.org -
He based his theory off of the law of conservation of mass and the law of constant composition. He also researched color blindness, which he had. Source: KhanAcademy.com -
He also came up with the Billiard ball model. The model represents the atoms which he believed they could look, at the time. Source: Britannica.com -
He discovered that elementary gases were composed of two atoms such as Hydrogen and Oxygen. He also came up with Amadeo's Law. Source: Wikipedia.com -
He created the Periodic Table of Elements. His nickname was, "Father of the Periodic Table". Source: Google.com -
He discovered the electron through his Cathode Ray Tube experiment. His most famous experiment was the CRT. Source: Britannica.com -
Discovered a few new elements, such as Polonium and radium, using radioactivity. They were awarded the Nobel Prize in 1903 for Physics. Source: Britannica.com -
He also came with the Plum Muddling model. The model can show the negatively charged electrons. Source: Wikipedia.com -
He proved the existence of the atom by the movement of liquid molecules. He is known as one of the most influential scientists of all time. Source: CK12.org -
He found that atoms have small nuclei at their center and most atoms volumes have empty space. He is known as the "Father of Nuclear Physics". Source: Google.com -
He discovered the elementary charge of an electron using the oil drop experiment. He also won a Nobel prize in 1923 for Physics. Source: Google.com -
He suggested that electrons orbit around the nucleus, but in certain patterns. He also received the Nobel Prize for Physics in 1922. Source: Google.com -
He helped arrange elements with the concept of how many protons an element has, or its atomic number. Source: Google.com -
He developed an equation to find the behavior of electrons in atoms around the atomic nucleus. He also won the Nobel Prize in 1933 for Physics. Source: Britannica.com -
He also came up with the electron cloud model. The model shows for visualizing the electrons in an atom. Source: Google.com -
He discovered the neutron, helping define the picture of an atom better. He also wrote the final draft of the MAUD report. Source: Nobelprize.org