Essay About John Dalton And Mass Of An Atom

Periodic Table
Join now to read essay Periodic Table
Periodic Table
First noticed by Greek people in about 400BC. They used the words
“element”, and “atom” to describe the differences and smallest parts of
matter. Those ideas lasted for 2000 years. Elements were Earth, Fire, Air,
and Water that explained “world stuff” easily came and went.
In the 1600s Boyle, an experimenter, influenced by Democritus,
Gassendi, and Descartes lent important weight to the atomic theory of
matter. In the 1700s Lavoisier divided the elements into four classes.
John Dalton suggested that the mass of an atom is the important property.
“The chemical elements are composed of indivisible particles of
matter, called atoms atoms of the same element are identical in all
respects, particularly weight.”
n the 1800s Doereiner said that some elements had a relative atomic
mass, and DeChancourtois made a table of elements to show the periodic
reoccurrence of properties. In the 1860s Newland made a table of
elements giving them a serial number in order of their atomic weighs
starting with Hydrogen.
Meyer and Mendeleyev made periodic tables independently. Meyer
made it more periodicity of physical properties, and Mendeleyev made it
more on the chemical properties. Mendeleyev published his periodic table
& law in 1869. Periodic tables have always been related to how scientists
thought