Mynd:Periodic table discovery periods.png
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Periodic_table_discovery_periods.png (687 × 502 pixel, stødd fílu: 111 KB, MIME-slag: image/png)
Samandráttur
| Frágreiðing |
English: Periodic Table, main "discovery periods" |
| Dagur | |
| Kelda | http://old.iupac.org/reports/periodic_table/index.html |
| Høvundur | 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).
Lisensur
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| Dagur/Tíð | Lítil mynd | Dimensjónir | Brúkari | Viðmerking | |
|---|---|---|---|---|---|
| streymur | 4. nov 2012 kl. 05:47 | | 687 × 502 (111 KB) | Double sharp | fix positioning of group 3 label |
| 4. nov 2012 kl. 03:01 |  | 687 × 502 (111 KB) | Double sharp | added 113–118 | |
| 3. nov 2012 kl. 08:13 |  | 687 × 502 (110 KB) | Double sharp | insert Cn. I'll add the others based on FAC comments | |
| 2. apr 2010 kl. 23:50 |  | 687 × 502 (98 KB) | Krauss | cut the legend (that goes by text): see http://en.wikipedia.org/wiki/History_of_the_periodic_table | |
| 2. apr 2010 kl. 23:15 |  | 687 × 554 (105 KB) | Krauss | {{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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