Difference between revisions 443335395 and 468548801 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)
* <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):
 very recent discoveries; apart from [[ununhexium]], they are not confirmedsynthesis.</small>
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