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ഫലകം:Periodic table legend/Age of discovery

< ഫലകം:Periodic table legend
Background color shows age of discovery:
Antiquity to Middle Ages Middle Ages–​1799 1800–​1849 1850–​1899 1900–​1949 1950–​1999 Since 2000
(13 elements)
Antiquity to Middle Ages: unrecorded discoveries up into the Middle Ages 		(21 elements)
Discoveries during the age of enlightenment
 (24 elements)
Scientific and industrial revolutions 		(26 elements)
The age of classifying elements; application of spectrum analysis techniques: Boisbaudran, Bunsen, Crookes, Kirchhoff, and others "hunting emission line signatures" 		(13 elements)
Development of old quantum theory and quantum mechanics 		(16 elements)
Post Manhattan project; synthesis of atomic numbers 98 and above (colliders, bombardment techniques) 		(5 elements)
Recent synthesis
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