Difference between revisions 495396249 and 495467776 on enwiki

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Template:Compact periodic table discovery
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! colspan="32" | {{tnavbar-collapsible|{{pad}}[[Timeline of chemical elements discoveries]]|Timeline of Element Discovery}}
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| width="3.125%" style="background-color:#dddddd"|[[Hydrogen|H]]
| width="3.125%" colspan="30" |&nbsp;
| width="3.125%" style="background-color:#FBCB83"|[[Helium|He]]
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(contracted; show full)| style="background-color:#FBCB83" width="16%" |1850-1899
| style="background-color:#AAD26E" width="17%" |1900-1949
| style="background-color:#6CACDE" width="17%" |1950-1999
| style="background-color:#FC86F6" width="16%" |2000-present
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| colspan="32" align="left" |

<small>⏎
'''Legend'''
* <span style="background-color:#dddddd;">Before 1800</span> (34 elements): discoveries during and before the [[History of the periodic table#Age of Enlightenment|age of enlightenment]].
* <span style="background-color:#C1AD84;">1800-1849</span> (+24 elements):  science and [[Industrial Revolution|industrial]] revolutions. 
* <span style="background-color:#FBCB83;">1850-1899</span> (+26 elements):  the age of [[History of the periodic table#Classifying Elements|classifying elements]] recived the impulse of the [[Spectrum analysis#Origins|spectrum analysis]]. Boisbaudran, Bunsen, Crookes, Kirchhoff, and others "hunting [[emission line]] signatures".
* <span style="background-color:#AAD26E;">1900-1949</span> (+13 elements):  impulse with the [[old quantum theory]] and [[quantum mechanics]].
* <span style="background-color:#6CACDE;">1950-1999</span> (+16 elements):  "post atomic bomb" issues for atomic numbers 98 and above (colliders, bombardment techniques).
* <span style="background-color:#FC86F6;">2000-present</span> (+5 elements): recent synthesis.</small>
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