The Atomic Theory
The Atomic TheoryThe Atomic Theory
In this report I will give a history on the development of the atomic theory. I will
cover some of the most important dates in the development of atomic theory.
An atom was first thought of by the Ancient Greeks who believed that
matter was made of smaller particles called elements. The name they gave to these
particles was the atom.
In 1776 the man known as "The Father of Atomic Theory", John Dalton was born in England. He is
known as the father of atomic theory because he is the one who discovered many of the different masses for
different elements, he also discovered the different proportions which molecules are formed in. Dalton also
discovered the inert gases, and their failure to react with other substances.
In 1969 a Russian chemist, named Mendeleyev who a renowned teacher developed, the periodic law
of the properties of the chemical elements (which states that elements show a regular pattern when they are
arranged according to their atomic masses). Mendeleyev wrote a two-volume book called Principles of chemistry
(1868-1870), which later became a classic. These books included an improved version of the periodic table.
Sir Joseph Thomson, another important person in the development of the atomic theory, was born in
1906. Thomson won the Nobel Prize in...
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