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PERIODIC TABLE TIME LINE - Coggle Diagram
PERIODIC TABLE TIME LINE
John Dalton
Henry Mosely
Jöns Jacob Berzilius Discovery
Niels Bohr
Ernes Rutherford
William Ramsay
Norman Lockyer
Pierre Jean
Robert Bunsen
2 more items...
Gustav Kirchhoff
Created the Bunsen burner.
He conducted an experiment during a solar eclipse, which he thought would reveal elements that would otherwise be hidden.
Called the element Helium, named after the sun god.
Discovered Helium on earth and depicted Argon.
Proposed the composition of the atom was like a miniature solar system.
Proposed that electrons orbited around the nucleus in fixed shells
He discovered Cerium, Silicon, Thorium and Selenium.
Proposed that the nucleus was filled with secrets
Gave the idea of individual particles; atoms.