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Revision 472391631 of "Template:Periodic table (discovery periods)" on enwiki{| border="0" cellpadding="0" cellspacing="1" style="width:80%; background:#f7f7e9; {{{1|}}} border:1px solid #a9a9a9; margin-left: auto; margin-right: auto;"
|- bgcolor=#e9e955
! scope="col" style="width: 1.0%;" | [[Periodic table group|Group]] #
! scope="col" style="width: 5.5%;" | [[Alkali metal|1]]
! scope="col" style="width: 5.5%;" | [[Alkaline earth metal|2]]
! scope="col" style="width: 5.5%;" | [[Group 3 element|3]]
! scope="col" style="width: 5.5%;" | [[Group 4 element|4]]
! scope="col" style="width: 5.5%;" | [[Group 5 element|5]]
! scope="col" style="width: 5.5%;" | [[Group 6 element|6]]
! scope="col" style="width: 5.5%;" | [[Group 7 element|7]]
! scope="col" style="width: 5.5%;" | [[Group 8 element|8]]
! scope="col" style="width: 5.5%;" | [[Group 9 element|9]]
! scope="col" style="width: 5.5%;" | [[Group 10 element|10]]
! scope="col" style="width: 5.5%;" | [[Group 11 element|11]]
! scope="col" style="width: 5.5%;" | [[Group 12 element|12]]
! scope="col" style="width: 5.5%;" | [[Boron group|13]]
! scope="col" style="width: 5.5%;" | [[Carbon group|14]]
! scope="col" style="width: 5.5%;" | [[Nitrogen group|15]]
! scope="col" style="width: 5.5%;" | [[Chalcogen|16]]
! scope="col" style="width: 5.5%;" | [[Halogen|17]]
! scope="col" style="width: 5.5%;" | [[Noble gas|18]]
|-
! scope="col" | [[Periodic table period|Period]]
| colspan="18" | <br />
|-
! scope="row" | [[Period 1 element|1]]
| {{element cell| 1|hydrogen |H |1.00794(7) |Gas |Before 1800|Primordial}}
| colspan="16" | <br />
| {{element cell| 2|helium |He|4.002602(2) |Gas |1850-1899|Primordial}}
|-
! scope="row" | [[Period 2 element|2]]
| {{element cell| 3|lithium |Li|6.941(2) |Solid|1800-1849|Primordial}}
| {{element cell| 4|beryllium |Be|9.012182(3) |Solid|Before 1800|Primordial}}
| colspan="10" | <br />
| {{element cell| 5|boron |B |10.811(7) |Solid|1800-1849|Primordial}}
| {{element cell| 6|carbon |C |12.0107(8) |Solid|Before 1800|Primordial}}
| {{element cell| 7|nitrogen |N |14.00674(7) |Gas |Before 1800|Primordial}}
| {{element cell| 8|oxygen |O |15.9994(3) |Gas |Before 1800|Primordial}}
| {{element cell| 9|fluorine |F |18.9984032(5) |Gas |1850-1899|Primordial}}
| {{element cell|10|neon |Ne|20.1797(6) |Gas |1850-1899|Primordial}}
|-
! scope="row" | [[Period 3 element|3]]
| {{element cell|11|sodium |Na|22.98976928(2)|Solid|1800-1849|Primordial}}
| {{element cell|12|magnesium |Mg|24.3050(6) |Solid|Before 1800|Primordial}}
| colspan="10" | <br />
| {{element cell|13|aluminium |Al|26.9815386(8) |Solid|1800-1849|Primordial}}
| {{element cell|14|silicon |Si|28.0855(3) |Solid|1800-1849|Primordial}}
| {{element cell|15|phosphorus|P |30.973762(2) |Solid|Before 1800|Primordial}}
| {{element cell|16|sulfur |S |32.066(6) |Solid|Before 1800|Primordial}}
| {{element cell|17|chlorine |Cl|35.4527(9) |Gas |Before 1800|Primordial}}
| {{element cell|18|argon |Ar|39.948(1) |Gas |1850-1899|Primordial}}
|-
! scope="row" | [[Period 4 element|4]]
| {{element cell|19|potassium |K |39.0983(1) |Solid|1800-1849|Primordial}}
| {{element cell|20|calcium |Ca|40.078(4) |Solid|1800-1849|Primordial}}
| {{element cell|21|scandium |Sc|44.955912(6) |Solid|1850-1899|Primordial}}
| {{element cell|22|titanium |Ti|47.867(1) |Solid|Before 1800|Primordial}}
| {{element cell|23|vanadium |V |50.9415(1) |Solid|1800-1849|Primordial}}
| {{element cell|24|chromium |Cr|51.9961(6) |Solid|Before 1800|Primordial}}
| {{element cell|25|manganese |Mn|54.938045(5) |Solid|Before 1800|Primordial}}
| {{element cell|26|iron |Fe|55.845(2) |Solid|Before 1800|Primordial}}
| {{element cell|27|cobalt |Co|58.933195(5) |Solid|Before 1800|Primordial}}
| {{element cell|28|nickel |Ni|58.6934(2) |Solid|Before 1800|Primordial}}
| {{element cell|29|copper |Cu|63.546(3) |Solid|Before 1800|Primordial}}
| {{element cell|30|zinc |Zn|65.39(2) |Solid|Before 1800|Primordial}}
| {{element cell|31|gallium |Ga|69.723(1) |Solid|1850-1899|Primordial}}
| {{element cell|32|germanium |Ge|72.61(2) |Solid|1850-1899|Primordial}}
| {{element cell|33|arsenic |As|74.92160(2) |Solid|Before 1800|Primordial}}
| {{element cell|34|selenium |Se|78.96(3) |Solid|1800-1849|Primordial}}
| {{element cell|35|bromine |Br|79.904(1) |Liquid|1800-1849|Primordial}}
| {{element cell|36|krypton |Kr|83.80(1) |Gas |1850-1899|Primordial}}
|-
! scope="row" | [[Period 5 element|5]]
| {{element cell|37|rubidium |Rb|85.4678(3) |Solid|1850-1899|Primordial}}
| {{element cell|38|strontium |Sr|87.62(1) |Solid|Before 1800|Primordial}}
| {{element cell|39|yttrium |Y |88.90585(2) |Solid|Before 1800|Primordial}}
| {{element cell|40|zirconium |Zr|91.224(2) |Solid|Before 1800|Primordial}}
| {{element cell|41|niobium |Nb|92.90638(2) |Solid|1800-1849|Primordial}}
| {{element cell|42|molybdenum|Mo|95.94(1) |Solid|Before 1800|Primordial}}
| {{element cell|43|technetium|Tc|[97.9072] |Solid|1900-1949|Natural radio}}
| {{element cell|44|ruthenium |Ru|101.07(2) |Solid|1800-1849|Primordial}}
| {{element cell|45|rhodium |Rh|102.90550(2) |Solid|1800-1849|Primordial}}
| {{element cell|46|palladium |Pd|106.42(1) |Solid|1800-1849|Primordial}}
| {{element cell|47|silver |Ag|107.8682(2) |Solid|Before 1800|Primordial}}
| {{element cell|48|cadmium |Cd|112.411(8) |Solid|1800-1849|Primordial}}
| {{element cell|49|indium |In|114.818(3) |Solid|1850-1899|Primordial}}
| {{element cell|50|tin |Sn|118.710(7) |Solid|Before 1800|Primordial}}
| {{element cell|51|antimony |Sb|121.760(1) |Solid|Before 1800|Primordial}}
| {{element cell|52|tellurium |Te|127.60(3) |Solid|Before 1800|Primordial}}
| {{element cell|53|iodine |I |126.90447(3) |Solid|1800-1849|Primordial}}
| {{element cell|54|xenon |Xe|131.29(2) |Gas |1850-1899|Primordial}}
|-
! scope="row" | [[Period 6 element|6]]
| {{element cell|55|caesium |Cs|132.9054519(2)|Solid|1850-1899|Primordial}}
| {{element cell|56|barium |Ba|137.327(7) |Solid|Before 1800|Primordial}}
| {{element cell|*|lanthanides| | |Solid|Future|Undiscovered}}
| {{element cell|72|hafnium |Hf|178.49(2) |Solid|1900-1949|Primordial}}
| {{element cell|73|tantalum |Ta|180.94788(2) |Solid|1800-1849|Primordial}}
| {{element cell|74|tungsten |W |183.84(1) |Solid|Before 1800|Primordial}}
| {{element cell|75|rhenium |Re|186.207(1) |Solid|1900-1949|Primordial}}
| {{element cell|76|osmium |Os|190.23(3) |Solid|1800-1849|Primordial}}
| {{element cell|77|iridium |Ir|192.217(3) |Solid|1800-1849|Primordial}}
| {{element cell|78|platinum |Pt|195.084(9) |Solid|Before 1800|Primordial}}
| {{element cell|79|gold |Au|196.966569(4) |Solid|Before 1800|Primordial}}
| {{element cell|80|mercury |Hg|200.59(2) |Liquid|Before 1800|Primordial|mercury (element)}}
| {{element cell|81|thallium |Tl|204.3833(2) |Solid|1850-1899|Primordial}}
| {{element cell|82|lead |Pb|207.2(1) |Solid|Before 1800|Primordial}}
| {{element cell|83|bismuth |Bi|208.98040(1) |Solid|Before 1800|Primordial}}
| {{element cell|84|polonium |Po|[208.9824] |Solid|1850-1899|Natural radio}}
| {{element cell|85|astatine |At|[209.9871] |Solid|1900-1949|Natural radio}}
| {{element cell|86|radon |Rn|[222.0176] |Gas |1850-1899|Natural radio}}
|-
! scope="row" | [[Period 7 element|7]]
| {{element cell|87|francium |Fr|[223.0197] |Solid|1900-1949|Natural radio}}
| {{element cell|88|radium |Ra|[226.0254] |Solid|1850-1899|Natural radio}}
| {{element cell|**|actinides | | |Solid|Future|Undiscovered}}
| {{element cell|104|rutherfordium|Rf|[263.1125] |UnknownPhase|1950-1999|Synthetic}}
| {{element cell|105|dubnium |Db|[262.1144] |UnknownPhase|1950-1999|Synthetic}}
| {{element cell|106|seaborgium |Sg|[266.1219] |UnknownPhase|1950-1999|Synthetic}}
| {{element cell|107|bohrium |Bh|[264.1247] |UnknownPhase|1950-1999|Synthetic}}
| {{element cell|108|hassium |Hs|[269.1341] |UnknownPhase|1950-1999|Synthetic}}
| {{element cell|109|meitnerium |Mt|[268.1388] |UnknownPhase|1950-1999|Synthetic}}
| {{element cell|110|darmstadtium |Ds|[272.1463] |UnknownPhase|1950-1999|Synthetic}}
| {{element cell|111|roentgenium |Rg|[272.1535] |UnknownPhase|1950-1999|Synthetic}}
| {{element cell|112|copernicium |Cn|[277] |UnknownPhase|1950-1999|Synthetic}}
| {{element cell|113|ununtrium |Uut|[284] |UnknownPhase|2000-present|Synthetic}}
| {{element cell|114|ununquadium |Uuq|[289] |UnknownPhase|1950-1999|Synthetic}}
| {{element cell|115|ununpentium |Uup|[288] |UnknownPhase|2000-present|Synthetic}}
| {{element cell|116|ununhexium |Uuh|[292] |UnknownPhase|2000-present|Synthetic}}
| {{element cell|117|ununseptium |Uus|[291] |UnknownPhase|2000-present|Synthetic}}
| {{element cell|118|ununoctium |Uuo|[293] |UnknownPhase|2000-present|Synthetic}}
|-
| colspan="19" | <br />
|-
! scope="row" colspan="3" style="text-align: right; padding-right: 1em;" | * [[Lanthanide|Lanthanoids]]
| {{element cell|57|lanthanum |La|138.90547(7)|Solid|1800-1849|Primordial}}
| {{element cell|58|cerium |Ce|140.116(1) |Solid|1800-1849|Primordial}}
| {{element cell|59|praseodymium|Pr|140.90765(2)|Solid|1850-1899|Primordial}}
| {{element cell|60|neodymium |Nd|144.242(3) |Solid|1850-1899|Primordial}}
| {{element cell|61|promethium |Pm|[144.9127] |Solid|1900-1949|Natural radio}}
| {{element cell|62|samarium |Sm|150.36(2) |Solid|1850-1899|Primordial}}
| {{element cell|63|europium |Eu|151.964(1) |Solid|1850-1899|Primordial}}
| {{element cell|64|gadolinium |Gd|157.25(3) |Solid|1850-1899|Primordial}}
| {{element cell|65|terbium |Tb|158.92535(2)|Solid|1800-1849|Primordial}}
| {{element cell|66|dysprosium |Dy|162.500(1) |Solid|1850-1899|Primordial}}
| {{element cell|67|holmium |Ho|164.93032(2)|Solid|1850-1899|Primordial}}
| {{element cell|68|erbium |Er|167.259(3) |Solid|1800-1849|Primordial}}
| {{element cell|69|thulium |Tm|168.93421(2)|Solid|1850-1899|Primordial}}
| {{element cell|70|ytterbium |Yb|173.04(3) |Solid|1850-1899|Primordial}}
| {{element cell|71|lutetium |Lu|174.967(1) |Solid|1900-1949|Primordial}}
| <br />
|-
! scope="row" colspan="3" style="text-align: right; padding-right: 1em;" | ** [[Actinide|Actinoids]]
| {{element cell|89|actinium |Ac|[227.0277] |Solid|1850-1899|Natural radio}}
| {{element cell|90|thorium |Th|232.03806(2)|Solid|1800-1849|Primordial}}
| {{element cell|91|protactinium|Pa|231.03588(2)|Solid|1900-1949|Natural radio}}
| {{element cell|92|uranium |U |238.02891(3)|Solid|Before 1800|Primordial}}
| {{element cell|93|neptunium |Np|[237.0482] |Solid|1900-1949|Natural radio}}
| {{element cell|94|plutonium |Pu|[244.0642] |Solid|1900-1949|Primordial}}
| {{element cell|95|americium |Am|[243.0614] |Solid|1900-1949|Natural radio}}
| {{element cell|96|curium |Cm|[247.0703] |Solid|1900-1949|Natural radio}}
| {{element cell|97|berkelium |Bk|[247.0703] |Solid|1900-1949|Natural radio}}
| {{element cell|98|californium |Cf|[251.0796] |Solid|1950-1999|Natural radio}}
| {{element cell|99|einsteinium |Es|[252.0830] |Solid|1950-1999|Synthetic}}
| {{element cell|100|fermium |Fm|[257.0951] |Solid|1950-1999|Synthetic}}
| {{element cell|101|mendelevium|Md|[258.0984] |Solid|1950-1999|Synthetic}}
| {{element cell|102|nobelium |No|[259.1011] |Solid|1950-1999|Synthetic}}
| {{element cell|103|lawrencium |Lr|[262.110] |Solid|1950-1999|Synthetic}}
| <br />
|}
'''Legend'''
* {{colorbox|#DDDDDD}} Before 1800 (34 elements): discoveries during and before the [[History of the periodic table#Age of Enlightenment|age of enlightenment]].
* {{colorbox|#C1AD84}} 1800–1849 (24 elements): scientific and [[Industrial Revolution|industrial]] revolutions.
* {{colorbox|#FBCB83}} 1850–1899 (26 elements): the age of [[History of the periodic table#Classifying Elements|classifying elements]]; application of [[Spectrum analysis#Origins|spectrum analysis]] techniques: Boisbaudran, Bunsen, Crookes, Kirchhoff, and others "hunting [[emission line]] signatures".
* {{colorbox|#AAD26E}} 1900–1949 (13 elements): development of [[old quantum theory]] and [[quantum mechanics]].
* {{colorbox|#6CACDE}} 1950–1999 (16 elements): post Manhattan project; [[Synthetic element|synthesis]] of atomic numbers 98 and above ([[collider]]s, bombardment techniques).
* {{colorbox|#FC86F6}} Since 2000 (5 elements): recent synthesis.
<noinclude>
{{PeriodicTablesFooter}}
[[Category:Periodic table]]
</noinclude>All content in the above text box is licensed under the Creative Commons Attribution-ShareAlike license Version 4 and was originally sourced from https://en.wikipedia.org/w/index.php?oldid=472391631.
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