Editing Discovery of chemical elements (section)

== Periodic table of elements ==
{| border="0" cellpadding="0" cellspacing="2" style="table-layout:fixed; width:100%; background:{{element color|table bg}}; border:1px solid {{element color|table border}}; padding:2px; margin:0 auto;"
! colspan=20 style="background:{{element color|table title}}" | [[Periodic table]] by era of discovery
|- style="background:{{element color|table colheader}};"
!
! [[alkali metal|1]]
! [[alkaline earth metal|2]]
! style="width:2%" | &nbsp;
! [[group 3 element|3]]
! [[group 4 element|4]]
! [[group 5 element|5]]
! [[group 6 element|6]]
! [[group 7 element|7]]
! [[group 8 element|8]]
! [[group 9 element|9]]
! [[group 10 element|10]]
! [[group 11 element|11]]
! [[group 12 element|12]]
! [[boron group|13]]
! [[carbon group|14]]
! [[pnictogen|15]]
! [[chalcogen|16]]
! [[halogen|17]]
! [[noble gas|18]]
|-
! colspan=3 style="text-align:left;" | [[Group (periodic table)|Group]]&nbsp;→
! colspan=17 | &nbsp;
|-
! colspan=3 style="text-align:left;" | ↓&nbsp;[[Period (periodic table)|Period]]
! colspan=17 | &nbsp;
|-
! [[Period 1 element|1]]
| {{element cell| 1|hydrogen  |H ||gas|Before 1800|Primordial}}
| colspan="1"  |
| colspan="11" |
| colspan="5"  |
| {{element cell| 2|helium    |He||gas|1850-1899|Primordial}}
|-
! [[Period 2 element|2]]
| {{element cell| 3|lithium   |Li||solid|1800-1849|Primordial}}
| {{element cell| 4|beryllium |Be||solid|Before 1800|Primordial}}
| colspan="11" |
| {{element cell| 5|boron     |B ||solid|Before 1800|Primordial}}
| {{element cell| 6|carbon    |C ||solid|Antiquity to Middle Ages|Primordial}}
| {{element cell| 7|nitrogen  |N ||gas|Before 1800|Primordial}}
| {{element cell| 8|oxygen    |O ||gas|Before 1800|Primordial}}
| {{element cell| 9|fluorine  |F ||gas|Before 1800|Primordial}}
| {{element cell|10|neon      |Ne||gas|1850-1899|Primordial}}
|-
! [[Period 3 element|3]]
| {{element cell|11|sodium    |Na||solid|Before 1800|Primordial}}
| {{element cell|12|magnesium |Mg||solid|Before 1800|Primordial}}
| colspan="11" |
| {{element cell|13|aluminium |Al||solid|Before 1800|Primordial}}
| {{element cell|14|silicon   |Si||solid|Before 1800|Primordial}}
| {{element cell|15|phosphorus|P ||solid|Before 1800|Primordial}}
| {{element cell|16|sulfur    |S ||solid|Antiquity to Middle Ages|Primordial}}
| {{element cell|17|chlorine  |Cl||gas|Before 1800|Primordial}}
| {{element cell|18|argon     |Ar||gas|1850-1899|Primordial}}
|-
! [[Period 4 element|4]]
| {{element cell|19|potassium |K ||solid|Before 1800|Primordial}}
| {{element cell|20|calcium   |Ca||solid|Before 1800|Primordial}}
|
| {{element cell|21|scandium  |Sc||solid|1850-1899|Primordial}}
| {{element cell|22|titanium  |Ti||solid|Before 1800|Primordial}}
| {{element cell|23|vanadium  |V ||solid|1800-1849|Primordial}}
| {{element cell|24|chromium  |Cr||solid|Before 1800|Primordial}}
| {{element cell|25|manganese |Mn||solid|Before 1800|Primordial}}
| {{element cell|26|iron      |Fe||solid|Antiquity to Middle Ages|Primordial}}
| {{element cell|27|cobalt    |Co||solid|Before 1800|Primordial}}
| {{element cell|28|nickel    |Ni||solid|Before 1800|Primordial}}
| {{element cell|29|copper    |Cu||solid|Antiquity to Middle Ages|Primordial}}
| {{element cell|30|zinc      |Zn||solid|Antiquity to Middle Ages|Primordial}}
| {{element cell|31|gallium   |Ga||solid|1850-1899|Primordial}}
| {{element cell|32|germanium |Ge||solid|1850-1899|Primordial}}
| {{element cell|33|arsenic   |As||solid|Antiquity to Middle Ages|Primordial}}
| {{element cell|34|selenium  |Se||solid|1800-1849|Primordial}}
| {{element cell|35|bromine   |Br||liquid|1800-1849|Primordial}}
| {{element cell|36|krypton   |Kr||gas|1850-1899|Primordial}}
|-
! [[Period 5 element|5]]
| {{element cell|37|rubidium  |Rb||solid|1850-1899|Primordial}}
| {{element cell|38|strontium |Sr||solid|Before 1800|Primordial}}
|
| {{element cell|39|yttrium   |Y ||solid|Before 1800|Primordial}}
| {{element cell|40|zirconium |Zr||solid|Before 1800|Primordial}}
| {{element cell|41|niobium   |Nb||solid|1800-1849|Primordial}}
| {{element cell|42|molybdenum|Mo||solid|Before 1800|Primordial}}
| {{element cell|43|technetium|Tc||solid|1900-1949|From decay}}
| {{element cell|44|ruthenium |Ru||solid|1800-1849|Primordial}}
| {{element cell|45|rhodium   |Rh||solid|1800-1849|Primordial}}
| {{element cell|46|palladium |Pd||solid|1800-1849|Primordial}}
| {{element cell|47|silver    |Ag||solid|Antiquity to Middle Ages|Primordial}}
| {{element cell|48|cadmium   |Cd||solid|1800-1849|Primordial}}
| {{element cell|49|indium    |In||solid|1850-1899|Primordial}}
| {{element cell|50|tin       |Sn||solid|Antiquity to Middle Ages|Primordial}}
| {{element cell|51|antimony  |Sb||solid|Antiquity to Middle Ages|Primordial}}
| {{element cell|52|tellurium |Te||solid|Before 1800|Primordial}}
| {{element cell|53|iodine    |I ||solid|1800-1849|Primordial}}
| {{element cell|54|xenon     |Xe||gas|1850-1899|Primordial}}
|-
! [[Period 6 element|6]]
| {{element cell|55|caesium   |Cs||solid|1850-1899|Primordial}}
| {{element cell|56|barium    |Ba||solid|Before 1800|Primordial}}
| {{element cell-asterisk|1}}
| {{element cell|71|lutetium  |Lu||solid|1900-1949|Primordial}}
| {{element cell|72|hafnium   |Hf||solid|1900-1949|Primordial}}
| {{element cell|73|tantalum  |Ta||solid|1800-1849|Primordial}}
| {{element cell|74|tungsten  |W ||solid|Before 1800|Primordial}}
| {{element cell|75|rhenium   |Re||solid|1900-1949|Primordial}}
| {{element cell|76|osmium    |Os||solid|1800-1849|Primordial}}
| {{element cell|77|iridium   |Ir||solid|1800-1849|Primordial}}
| {{element cell|78|platinum  |Pt||solid|Antiquity to Middle Ages|Primordial}}
| {{element cell|79|gold      |Au||solid|Antiquity to Middle Ages|Primordial}}
| {{element cell|80|mercury   |Hg||Liquid|Antiquity to Middle Ages|Primordial|link=Mercury (element)}}
| {{element cell|81|thallium  |Tl||solid|1850-1899|Primordial}}
| {{element cell|82|lead      |Pb||solid|Antiquity to Middle Ages|Primordial}}
| {{element cell|83|bismuth   |Bi||solid|Antiquity to Middle Ages|Primordial}}
| {{element cell|84|polonium  |Po||solid|1850-1899|From decay}}
| {{element cell|85|astatine  |At||solid|1900-1949|From decay}}
| {{element cell|86|radon     |Rn||gas|1850-1899|From decay}}
|-
! [[Period 7 element|7]]
| {{element cell|87|francium      |Fr||solid|1900-1949|From decay}}
| {{element cell|88|radium        |Ra||solid|1850-1899|From decay}}
| {{element cell-asterisk|2vertical}}
| {{element cell|103|lawrencium   |Lr||unknown phase|1950-1999|Synthetic}}
| {{element cell|104|rutherfordium|Rf||unknown phase|1950-1999|Synthetic}}
| {{element cell|105|dubnium      |Db||unknown phase|1950-1999|Synthetic}}
| {{element cell|106|seaborgium   |Sg||unknown phase|1950-1999|Synthetic}}
| {{element cell|107|bohrium      |Bh||unknown phase|1950-1999|Synthetic}}
| {{element cell|108|hassium      |Hs||unknown phase|1950-1999|Synthetic}}
| {{element cell|109|meitnerium   |Mt||unknown phase|1950-1999|Synthetic}}
| {{element cell|110|darmstadtium |Ds||unknown phase|1950-1999|Synthetic}}
| {{element cell|111|roentgenium  |Rg||unknown phase|1950-1999|Synthetic}}
| {{element cell|112|copernicium  |Cn||unknown phase|1950-1999|Synthetic}}
| {{element cell|113|nihonium     |Nh||unknown phase|2000-present|Synthetic}}
| {{element cell|114|flerovium    |Fl||unknown phase|1950-1999|Synthetic}}
| {{element cell|115|moscovium    |Mc||unknown phase|2000-present|Synthetic}}
| {{element cell|116|livermorium  |Lv||unknown phase|2000-present|Synthetic}}
| {{element cell|117|tennessine   |Ts||unknown phase|2000-present|Synthetic}}
| {{element cell|118|oganesson    |Og||unknown phase|2000-present|Synthetic}}
|-
| colspan=20 style="line-height:50%;" | &nbsp;
|-
|  colspan="4" {{element cell-asterisk|1|align=right}}
| {{element cell|57|lanthanum   |La||solid|1800-1849|Primordial}}
| {{element cell|58|cerium      |Ce||solid|1800-1849|Primordial}}
| {{element cell|59|praseodymium|Pr||solid|1850-1899|Primordial}}
| {{element cell|60|neodymium   |Nd||solid|1800-1849|Primordial}}
| {{element cell|61|promethium  |Pm||solid|1900-1949|From decay}}
| {{element cell|62|samarium    |Sm||solid|1850-1899|Primordial}}
| {{element cell|63|europium    |Eu||solid|1850-1899|Primordial}}
| {{element cell|64|gadolinium  |Gd||solid|1850-1899|Primordial}}
| {{element cell|65|terbium     |Tb||solid|1800-1849|Primordial}}
| {{element cell|66|dysprosium  |Dy||solid|1850-1899|Primordial}}
| {{element cell|67|holmium     |Ho||solid|1850-1899|Primordial}}
| {{element cell|68|erbium      |Er||solid|1800-1849|Primordial}}
| {{element cell|69|thulium     |Tm||solid|1850-1899|Primordial}}
| {{element cell|70|ytterbium   |Yb||solid|1850-1899|Primordial}}
| &nbsp;
|-
|  colspan="4" {{element cell-asterisk|2vertical|align=right}}
| {{element cell|89|actinium    |Ac||solid|1900-1949|From decay}}
| {{element cell|90|thorium     |Th||solid|1800-1849|Primordial}}
| {{element cell|91|protactinium|Pa||solid|1900-1949|From decay}}
| {{element cell|92|uranium     |U ||solid|Before 1800|Primordial}}
| {{element cell|93|neptunium   |Np||solid|1900-1949|From decay}}
| {{element cell|94|plutonium   |Pu||solid|1900-1949|From decay}}
| {{element cell|95|americium   |Am||solid|1900-1949|Synthetic}}
| {{element cell|96|curium      |Cm||solid|1900-1949|Synthetic}}
| {{element cell|97|berkelium   |Bk||solid|1900-1949|Synthetic}}
| {{element cell|98|californium |Cf||solid|1950-1999|Synthetic}}
| {{element cell|99|einsteinium |Es||solid|1950-1999|Synthetic}}
| {{element cell|100|fermium    |Fm||unknown phase|1950-1999|Synthetic}}
| {{element cell|101|mendelevium|Md||unknown phase|1950-1999|Synthetic}}
| {{element cell|102|nobelium   |No||unknown phase|1950-1999|Synthetic}}
| &nbsp;
|-
| colspan=20 style="line-height:50%;" | &nbsp;
|-
| colspan=20|
{{Periodic table legend
|theme1=Age of discovery
|theme2=State of matter|unknown2=yes
|theme3=occurrence}}
|}