The Progress of the Atomic Structure

Topics: Atom, Neutron, Electric charge Pages: 4 (1109 words) Published: September 14, 2010
The Progress of the Atomic structure

Different theories about the atomic structure were introduced over time. These theories changed as a result of development of different experiments. Leucippus was the first to introduce the theory of atomism, however he didn’t write about his theories in detail. However, Democritus, his student wrote about the theory of atoms in detail. He theorised that everything was composed of atoms and that atoms are solid and indestructible. He also had a theory that there’s a relation between the solidness of the material and the type of atoms it’s made of as atoms differ in shape, mass and size. For example: metal is made from solid atoms that interlock with each other mechanically to keep them in place. On the other hand water is composed of slippery smooth atoms that allow the water to have its flexible properties.

Robert Doyle was a scientist who built up his theories by conducting experimental observations. He discovered that in solids particles were put in fixed position hence their properties and that unlike solids, liquids and gases are composed of particles that are free to move hence the properties of liquids and gases. He also discovered that by mixing these tiny particles, compounds are made or as he called them “mixt bodies”.

In 1803 John Dalton developed the theory of atomism by conducting different experiments and he found out that each element is composed of different atoms to other elements. He also theorised that all the atoms in an element is identical and that compounds are made of two kinds of atoms combined together, which lead him to develop the idea that chemical reactions change the way atoms are grouped together. He also had a theory that atoms are in and could not be created nor destroyed and they can’t be divided into smaller sections.

Eugen Goldstein was a physicist, who experimented with electrical discharge tube by passing an electric current between an anode and a cathode surrounded by gas at...
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