Please enable JavaScript.
Coggle requires JavaScript to display documents.
Historical Development of the Periodic Table. - Coggle Diagram
Historical Development of the Periodic Table.
1669
1680
1809
1863
1869
1886
1894
1897
1900
2 more items...
English physicist J. J. Thomson first discovered electrons
small negatively charged particles in an atom
William Ramsay and Lord Rayleigh discovered the noble gases, which were added to the periodic table as group 0.
Antoine Bequerel first discovered radioactivity
student Ernest Rutherford named three types of radiation; alpha, beta and gamma rays.
Marie and Pierre Curie started working on the radiation of uranium and thorium, and subsequently discovered radium and polonium. They discovered that beta particles were negatively charged.
Russian chemist Dimitri Mendeleev started the development of the periodic table, arranging chemical elements by atomic mass.
He predicted the discovery of other elements, and left spaces open in his periodic table for them.
John Newlands divided the then discovered 56 elements into 11 groups, based on characteristics.
at least 47 elements where discovered
Scientists began to see patterns in the characteristic.
Robert Boyle also discovered phosphorus,
so it became public
German merchant and amateur alchemist Hennig Brand attempted to created a Philosopher’s Stone
He heated residues from boiled urine, and a liquid dropped out and burst into flames. This was the first discovery of phosphorus.