1500 - 1699
1700 - 1800
Periodic Table of the Elements
In 1780 Johann Wolfgang Dobereine observes similarities between elements that
suggest that they are periodic in nature. Dimitri Ivanovich Mendeleev published
a relatively complete periodic table in 1869.
||A solid substance that is a good conductor of heat and electricity. Can be formed into many shapes.
||"Middle elements" - conduct heat and electricity better than nonmetals, but not as well as metals. Easier to shape than nonmetals, but not as easy as metals. Solid at room temperature.
||A poor conductor of heat and electricity. Not easily formed into shapes.
For a Periodic Table that gives you the date and discoverer of each element Click
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