Contributions
John Dalton contributed a lot to the atomic theory. He was the first scientist to explain the behavior of atoms in terms of the measurement of weight. He also revealed the concept of Dalton's Law of Partial Pressures in 1803.
His atomic theory stated that all elements were made of tiny particles called atoms. He said that all atoms of an element were identical and they had the same mass. He also said that the reason elements were different from each other was that atoms of each element were different from one another. They had different masses. He also talked about compounds. He said that compounds had atoms of different elements combined together (The definition of compound is two or more substances mixed together). He talked about how chemical reactions rearranged the combinations of the atoms, and that atoms cannot be made or destroyed. This is important because Dalton's theory led to new discoveries and new fields of experimentation.
His atomic theory stated that all elements were made of tiny particles called atoms. He said that all atoms of an element were identical and they had the same mass. He also said that the reason elements were different from each other was that atoms of each element were different from one another. They had different masses. He also talked about compounds. He said that compounds had atoms of different elements combined together (The definition of compound is two or more substances mixed together). He talked about how chemical reactions rearranged the combinations of the atoms, and that atoms cannot be made or destroyed. This is important because Dalton's theory led to new discoveries and new fields of experimentation.