File:Periodic table discovery periods.png
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Summary[edit]
| Description |
English: Periodic Table, main "discovery periods" |
| Date | |
| Source | http://old.iupac.org/reports/periodic_table/index.html |
| Author | IUPAC |
Legend:
- Before 1800 (38 elements): discoveries during and before the age of enlightenment.
- 1800-1849 (+22 elements): science and industrial revolutions.
- 1850-1899 (+23 elements): the age of classifying elements recived the impulse of the spectrum analysis. Boisbaudran, Bunsen, Crookes, Kirchhoff, and others "hunting wikipedia:emission line signatures".
- 1900-1949 (+13 elements): impulse with the wikipedia:old quantum theory and wikipedia:quantum mechanics.
- 1950-present (+22 elements): "post atomic bomb" issues for atomic numbers 97 and above (colliders, bombardment techniques).
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The copyright holder of this file allows anyone to use it for any purpose, provided that the copyright holder is properly attributed. Redistribution, derivative work, commercial use, and all other use is permitted. |
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 05:47, 4 November 2012 | | 687 × 502 (111 KB) | Double sharp (talk | contribs) | fix positioning of group 3 label |
| 03:01, 4 November 2012 |  | 687 × 502 (111 KB) | Double sharp (talk | contribs) | added 113–118 | |
| 08:13, 3 November 2012 |  | 687 × 502 (110 KB) | Double sharp (talk | contribs) | insert Cn. I'll add the others based on FAC comments | |
| 23:50, 2 April 2010 |  | 687 × 502 (98 KB) | Krauss (talk | contribs) | cut the legend (that goes by text): see http://en.wikipedia.org/wiki/History_of_the_periodic_table | |
| 23:15, 2 April 2010 |  | 687 × 554 (105 KB) | Krauss (talk | contribs) | {{Information |Description={{en|1=Periodic Table, main "discovery periods"}} |Source=http://old.iupac.org/reports/periodic_table/index.html |Author=IUPAC |Date=2004 |Permission= |other_versions= }} it is for free usage! (and periodic table fig is public d |
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