Basiskennis chemie/Classificatie van stoffen/Periodiek Systeem Elementen: verschil tussen versies

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==== Jaartal van ontdekking ====
{{Basiskennis chemie/Periodiek Systeem Ontdekt}}
{| align=center bd=1 cp=0 cs=1 style="border-style:none;border-width:0px"
| align="left" valign="top" width="60" | '''Tabel 2:'''|| align="left" valign="top" colspan="18" | '''Het jaar waarin elementen ontdekt zijn. De elementen op een grijsachtige achtergrond zijn pas ontdekt na het opstellen van het periodiek systeem der elementen'''<ref>De jaartallen zijn ontleend aan de verschillende artkelen over de diverse elementen in de Wikipedia.</ref>
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|style="border-style:none" |
|align=center valign=bottom style="border-style:none" | [[w:/Alkalimetaal|1<br />Ia]]
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|width=32 style="border-style:none" |
|width=32 style="border-style:none" |
|width=32 style="border-style:none" |
|align=center valign=bottom width=32 style="border-style:none" | [[w:/Edelgas|18<br />0]]
|-
| align="center" | [[w:/Periode-1-element|1]]
|align=center valign=bottom width=32 style="border-style:solid; border-width:1px; border-color:#888888; background:#F7FC27; color:black;" | <font size=1>1766<br />[[w:Waterstof (element)|H]]</font>
|align=center valign=bottom style="border-style:none" | [[w:/Aardalkalimetaal|2<br />IIa]]
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|style="border-style:none" |
|align=center valign=bottom style="border-style:none" | [[w:/Boorgroep|13<br />IIIa]]
|align=center valign=bottom style="border-style:none" | [[w:/Koolstofgroep|14<br />IVa]]
|align=center valign=bottom style="border-style:none" | [[w:/Stikstofgroep|15<br />Va]]
|align=center valign=bottom style="border-style:none" | [[w:/Zuurstofgroep|16<br />VIa]]
|align=center valign=bottom style="border-style:none" | [[w:/Halogeen|17<br />VIIa]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#eeeeee; color:black;" | <font size=1>1895<br />[[w:Helium|He]]</font><ref>Helium was in 1868 al gevonden in de chromosfeer van de zon, daaraan dankt het zijn naam. Pas in 1895 werd het ook op aarde gevonden en konden naast de spectroscopische ook andere eigenschappen bestudeerd worden.</ref>
|-
| align="center" | [[w:/Periode-2-element|2]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1817</font><br />[[w:Lithium (element)|Li]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#F7FC27; color:black;" | <font size=1>1798</font><br />[[w:Beryllium|Be]]
|style="border-style:none" |
|style="border-style:none" |
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|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1808</font><br />[[w:Boor (element)|B]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#FFB3B0; color:black;" | <font size=1>oudh</font><ref name="oudh">oudh: het element is als sinds de oudheid bekend.</ref><br />[[w:Koolstof|C]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#F7FC27; color:black;" | <font size=1>1772</font><br />[[w:Stikstof (element)|N]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#F7FC27; color:black;" | <font size=1>1771</font><br />[[w:Zuurstof (element)|O]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#eeeeee; color:black;" | <font size=1>1886</font><br />[[w:Fluor (element)|F]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#eeeeee; color:black;" | <font size=1>1898</font><br />[[w:Neon (element)|Ne]]
|-
| align="center" | [[w:/Periode-3-element|3]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1807</font><br />[[w:Natrium|Na]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1808</font><br />[[w:Magnesium|Mg]]
|align=center valign=bottom style="border-style:none" | [[w:/Scandiumgroep|3<br />IIIb]]
|align=center valign=bottom style="border-style:none" | [[w:/Titaangroep|4<br />IVb]]
|align=center valign=bottom style="border-style:none" | [[w:/Vanadiumgroep|5<br />Vb]]
|align=center valign=bottom style="border-style:none" | [[w:/Chroomgroep|6<br />VIb]]
|align=center valign=bottom style="border-style:none" | [[w:/Mangaangroep|7<br />VIIb]]
|align=center valign=bottom style="border-style:none" | [[w:/Platinagroep|8<br />VIIIb]]
|align=center valign=bottom style="border-style:none" | [[w:/Platinagroep|9<br />VIIIb]]
|align=center valign=bottom style="border-style:none" | [[w:/Platinagroep|10<br />VIIIb]]
|align=center valign=bottom style="border-style:none" | [[w:/Kopergroep|11<br />Ib]]
|align=center valign=bottom style="border-style:none" | [[w:/Zinkgroep|12<br />IIb]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1824</font><br />[[w:Aluminium|Al]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1817</font><br />[[w:Silicium|Si]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#FFDDBB; color:black;" | <font size=1>1669</font><br />[[w:Fosfor|P]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#FFB3B0; color:black;" | <font size=1>oudh</font><br />[[w:Zwavel|S]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#F7FC27; color:black;" | <font size=1>1774</font><br />[[w:Chloor (element)|Cl]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#eeeeee; color:black;" | <font size=1>1894</font><br />[[w:Argon|Ar]]
|-
| align="center" | [[w:Periode-4-element|4]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1807</font><br />[[w:Kalium|K]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1808</font><br />[[w:Calcium|Ca]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#eeeeee; color:black;" | <font size=1>1879</font><br />[[w:Scandium|Sc]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#F7FC27; color:black;" | <font size=1>1791</font><br />[[w:Titanium|Ti]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1830</font><br />[[w:Vanadium|V]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#F7FC27; color:black;" | <font size=1>1797</font><br />[[w:Chroom (element)|Cr]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#F7FC27; color:black;" | <font size=1>1774</font><br />[[w:Mangaan|Mn]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#FFB3B0; color:black;" | <font size=1>oudh</font><ref name="oudh" /><br />[[w:IJzer (element)|Fe]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#FBFE92; color:black;" | <font size=1>1735</font><br />[[w:Kobalt|Co]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#F7FC27; color:black;" | <font size=1>1751</font><br />[[w:Nikkel|Ni]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#FFB3B0; color:black;" | <font size=1>oudh</font><ref name="oudh" /><br />[[w:Koper (element)|Cu]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#FBFE92; color:black;" | <font size=1>1746</font><br />[[w:Zink (element)|Zn]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#eeeeee; color:black;" | <font size=1>1875</font><br />[[w:Gallium|Ga]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#eeeeee; color:black;" | <font size=1>1886</font><br />[[w:Germanium|Ge]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#FF8582; color:black;" | <font size=1>1250</font><br />[[w:Arseen|As]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1817</font><br />[[w:Seleen|Se]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1826</font><br />[[w:Broom (element)|Br]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#eeeeee; color:black;" | <font size=1>1898</font><br />[[w:Krypton (element)|Kr]]
|-
| align="center" | [[w:Periode-5-element|5]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1861</font><br />[[w:Rubidium|Rb]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1808</font><br />[[w:Strontium|Sr]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1828</font><br />[[w:Yttrium|Y]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#F7FC27; color:black;" | <font size=1>1789</font><br />[[w:Zirkonium|Zr]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1801</font><br />[[w:Niobium|Nb]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#F7FC27; color:black;" | <font size=1>1782</font><br />[[w:Molybdeen|Mo]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#cccccc; color:black;" | <font size=1>1937</font><br />[[w:Technetium|Tc]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1844</font><br />[[w:Ruthenium|Ru]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1803</font><br />[[w:Rhodium|Rh]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1803</font><br />[[w:Palladium (element)|Pd]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#FFB3B0; color:black;" | <font size=1>oudh</font><br />[[w:Zilver|Ag]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1817</font><br />[[w:Cadmium|Cd]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1863</font><br />[[w:Indium|In]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#FFB3B0; color:black;" | <font size=1>oudh</font><br />[[w:Tin (element)|Sn]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#FF8582; color:black;" | <font size=1>1450</font><br />[[w:Antimoon|Sb]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#F7FC27; color:black;" | <font size=1>1782</font><br />[[w:Telluur|Te]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1811</font><br />[[w:Jodium (element)|I]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#eeeeee; color:black;" | <font size=1>1898</font><br />[[w:Xenon|Xe]]
|-
| align="center" | [[w:Periode-6-element|6]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1860</font><br />[[w:Cesium|Cs]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#F7FC27; color:black;" | <font size=1>1774</font><br />[[w:Barium|Ba]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#ddbbdd;" | <font size=1>*</font><br />
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#cccccc; color:black;" | <font size=1>1922</font><br />[[w:Hafnium|Hf]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1802</font><br />[[w:Tantaal|Ta]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#F7FC27; color:black;" | <font size=1>1783</font><br />[[w:Wolfraam|W]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#cccccc; color:black;" | <font size=1>1925</font><br />[[w:Renium|Re]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1803</font><br />[[w:Osmium|Os]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1803</font><br />[[w:Iridium (element)|Ir]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#FBFE92; color:black;" | <font size=1>1740</font><br />[[w:Platina|Pt]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#FFB3B0; color:black;" | <font size=1>oudh</font><br />[[w:Goud|Au]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#FFB3B0; color:black;" | <font size=1>oudh</font><br />[[w:Kwik|Hg]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1861</font><br />[[w:Thallium|Tl]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#FFB3B0; color:black;" | <font size=1>oudh</font><br />[[w:Lood (element)|Pb]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#F7FC27; color:black;" | <font size=1>1752</font><br />[[w:Bismut|Bi]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#eeeeee; color:black;" | <font size=1>1898</font><br />[[w:Polonium|Po]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#cccccc; color:black;" | <font size=1>1940</font><br />[[w:Astaat|At]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#eeeeee; color:black;" | <font size=1>1900</font><br />[[w:Radon (element)|Rn]]
|-
| align="center" | [[w:Periode-7-element|7]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#cccccc; color:black;" | <font size=1>1939</font><br />[[w:Francium|Fr]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#eeeeee; color:black;" | <font size=1>1898</font><br />[[w:Radium|Ra]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#dd88dd;" | <font size=1>**</font><br />
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#aaaaaa; color:white;" | <font size=1>1964</font><br />[[w:Rutherfordium|Rf]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#aaaaaa; color:white;" | <font size=1>1967</font><br />[[w:Dubnium|Db]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#aaaaaa; color:white;" | <font size=1>1974</font><br />[[w:Seaborgium|Sg]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#aaaaaa; color:white;" | <font size=1>1976</font><br />[[w:Bohrium|Bh]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#aaaaaa; color:white;" | <font size=1>1984</font><br />[[w:Hassium|Hs]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#aaaaaa; color:white;" | <font size=1>1982</font><br />[[w:Meitnerium|Mt]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#aaaaaa; color:white;" | <font size=1>1994</font><br />[[w:Darmstadtium|Ds]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#aaaaaa; color:white;" | <font size=1>19994</font><br />[[w:Röntgenium|Rg]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#aaaaaa; color:white;" | <font size=1>1996</font><br />[[w:Copernicium|Cn]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#888888; color:white;" | <font size=1>2004</font><br />[[w:Nihonium|Nh]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#aaaaaa; color:white;" | <font size=1>1998</font><br />[[w:Flerovium|Fl]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#888888; color:white;" | <font size=1>2004</font><br />[[w:Moscovium|Mc]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#aaaaaa; color:white;" | <font size=1>2000</font><br />[[w:Livermorium|Lv]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#888888; color:white;" | <font size=1>2010</font><br />[[w:Ununseptium|Uus]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#aaaaaa; color:white;" | <font size=1>1999</font><br />[[w:Oganesson|Og]]
|-
|colspan="19" style="border-style:none" |
|-
|style="border-style:none" colspan=3 | *[[w:Lanthanide|Lanthanide]]n
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1839</font><br />[[w:Lanthaan|La]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1803</font><br />[[w:Cerium|Ce]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#eeeeee; color:black;" | <font size=1>1885</font><br />[[w:Praseodymium|Pr]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#eeeeee; color:black;" | <font size=1>1885</font><br />[[w:Neodymium|Nd]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#cccccc; color:black;" | <font size=1>1941</font><br />[[w:Promethium|Pm]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1853</font><br />[[w:Samarium|Sm]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#eeeeee; color:black;" | <font size=1>1896</font><br />[[w:Europium|Eu]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#eeeeee; color:black;" | <font size=1>1886</font><br />[[w:Gadolinium|Gd]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1843</font><br />[[w:Terbium|Tb]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#eeeeee; color:black;" | <font size=1>1886</font><br />[[w:Dysprosium|Dy]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#eeeeee; color:black;" | <font size=1>1878</font><br />[[w:Holmium|Ho]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1843</font><br />[[w:Erbium|Er]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#eeeeee; color:black;" | <font size=1>1879</font><br />[[w:Thulium|Tm]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#eeeeee; color:black;" | <font size=1>1878</font><br />[[w:Ytterbium|Yb]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#cccccc; color:black;" | <font size=1>1907</font><br />[[w:Lutetium|Lu]]
|-
|style="border-style:none" colspan=3 | **[[w:Actinide|Actinide]]n
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#eeeeee; color:black;" | <font size=1>1899</font><br />[[w:Actinium|Ac]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#32FC27; color:black;" | <font size=1>1828</font><br />[[w:Thorium|Th]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#cccccc; color:black;" | <font size=1>1913</font><br />[[w:Protactinium|Pa]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#F7FC27; color:black;" | <font size=1>1789</font><br />[[w:Uranium|U]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#cccccc; color:black;" | <font size=1>1940</font><br />[[w:Neptunium|Np]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#cccccc; color:black;" | <font size=1>1940</font><br />[[w:Plutonium|Pu]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#cccccc; color:black;" | <font size=1>1944</font><br />[[w:Americium|Am]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#cccccc; color:black;" | <font size=1>1944</font><br />[[w:Curium|Cm]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#cccccc; color:black;" | <font size=1>1949</font><br />[[w:Berkelium|Bk]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#cccccc; color:black;" | <font size=1>1950</font><br />[[w:Californium|Cf]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#aaaaaa; color:white;" | <font size=1>1952</font><br />[[w:Einsteinium|Es]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#aaaaaa; color:white;" | <font size=1>1952</font><br />[[w:Fermium|Fm]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#aaaaaa; color:white;" | <font size=1>1955</font><br />[[w:Mendelevium|Md]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#aaaaaa; color:white;" | <font size=1>1958</font><br />[[w:Nobelium|No]]
|align=center valign=bottom style="border-style:solid; border-width:1px; border-color:#888888; background:#aaaaaa; color:white; color:white;#dd88dd;" | <font size=1>1961</font><br />[[w:Lawrencium|Lr]]
|}
 
 
{| align=center cp=0 cs=0 style="border-style:none;border-width:0px;"
|+ '''Periode waarin de elementen ontdekt zijn'''
|-
|style="background:#FFB3B0; border-style:solid; border-width:1px; border-color:#888888; color:black;" align="middle" |Oudheid
|style="background:#FF8582; border-style:solid; border-width:1px; border-color:#888888; color:black; " align="middle" | <1650
|style="background:#FFDDBB; border-style:solid; border-width:1px; border-color:#888888; color:black; " align="middle" |1651-1700
|style="background:#FBFE92; border-style:solid; border-width:1px; border-color:#888888; color:black; " align="middle" |1701-1750
|style="background:#F7FC27; border-style:solid; border-width:1px; border-color:#888888; color:black; " align="middle" |1751-1800
|-
|style="background:#32FC27; border-style:solid; border-width:1px; border-color:#888888; color:black; " align="middle" |1801-1868
|style="background:#eeeeee; border-style:solid; border-width:1px; border-color:#888888; color:black; " align="middle" | 1869-1900
|style="background:#cccccc; border-style:solid; border-width:1px; border-color:#888888; color:black; " align="middle" | 1901-1950
|style="background:#aaaaaa; border-style:solid; border-width:1px; border-color:#888888; color:white; " align="middle" | 1951-2000
|style="background:#888888; border-style:solid; border-width:1px; border-color:#888888; color:white; " align="middle" | >2000
|}
 
==== Het Periodiek systeem in 1869 ====
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