John Dalton's Atomic Theory

John Dalton was one of the first men to say that there is a possibility of matter to be made up of small particles. He reviewed a Greek philosophers idea of the atom and with experimenting he came up with his Dalton's Postulates state that all matter is composed of small, indivisible particles called atoms. All atoms of a given element are identical in mass and properties. Atoms are not created, destroyed, or converted into other kinds of atoms during chemical reactions; they are simply rearranged into new compounds. Compounds are formed by a combination of two or more atoms in definite arrangements in the ratio of small whole numbers.John Dalton later proposed the Law of Multiple Proportions. This law

states that more than one chemical compound can be formed with the same two elements.This was found with his experiments with gases.John Dalton's postulate that states “all atoms of a given element are identical in mass”.The idea that each element must have a characteristic atomic mass. this

was a big step to classifying of elements and The periodic table being created later in the century.Later when better tools were available other scientist conducted some experiments and found that some of his Postulates were wrong.Even though his theories are no longer valid, his part in the
development of modern atomic theory is considerable.

His theories and methods formed the future scientific research about the atom that still continues.All the other experiments people has done about the atom could not have been done without his help. He brung back the theory of the atom and got other people after him to keep doing research and contributing to the atomic theory.Without John dalton we probably would not have the same atomic theory and we might not even have it.I think john dalton played one of the biggest parts in the atomic theory.After john dalton there was,J.J. Thomson,Ernest Rutherford,and Niels Bohr.Dalton's most significant work was done between 1795 and 1805, but fame came later—when the importance of his atomic theory was realized. He became a member of the Royal Society in 1822, received its first Royal Medal in 1826, and was honored with a state pension in 1833, among other honors. He died on July 27, 1844, and 40,000 people attended his

funeral.