Eighteen-Hundred+to+Eighteen+Seventy+Four

1869 Dmitri Mendelev

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Dmitri Mendeleev was born at Tobolsk, Siberia in 1834 and lived until 1907.Dmitri Mendeleev furthered the idea of the periodic table by sorting the atoms into seven groups by their properties. There were only 63 known atoms at the time. He predicted the founding of new atoms and mistakes in the details of the already known atoms. Mendeleev also found that the properties of the elements "were periodic functions of their atomic weights". (McGraw Hill) This became known as periodic law.

1873 James Clerk Maxwell physics.fsu.edu James Clerk Maxwell was born in 1831 in Edinburgh and died in 1879. In 1856 Maxwell became a physics professor. James Clerk Maxwell proposed the idea of electric and magnetic fields that fill the space between the parts of an atom.

1874 G.J. Stoney klima-luft.de G.J. Stoney was born in Febrary of 1826 and died in July of 1911. G.J. Stoney in 1874 stated his belief that electricity was made of negative particles called electrons. He did not just introduce the name, but the concept. In 1891 he showed the movement of the electrons in a gas.(Offaly)

Works Cited for Eighteen Hundred to Eighteen Seventy- Four