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The Atomic Theory
Part 1 of Paper
....nt 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
.... Part 2 of Paper
.... his work in the conduction of electricty through gases.
He discovered the electron by using cathode rays. An electron is the smallest particle of an atom, the charge on
an electron is negative.
Ernest Rutherford, who was born in 1871 identified the three main components of radioactivity: alpha,
beta, and gamma particles. Radioactivity was discovered by a French scientist named Becquerel. Rutherford
was also the first one to disdcover the true structure of an atom. An atom has a centra.... |
| Number of words: 423 - Approximate pages: 2 |
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