This template is a wrapper for a number of legends, each called a theme, used in periodic tables. Each theme is a subtable that can have individual settings, for example to show "predicted".

The wrapper itself can have settings:

{{Periodic table legend
|child=yes/no (no: stand alone table; default=yes: inside another table, usually the PT table)
|caption= (text to appear as caption for the legend block)
|style= (set style)
...
|}

All parameters looks like:

{{Periodic table legend
|child=
|caption=
|style=

|theme1=
|predicted1=
|sa1=
|eka-sa1=
|unknown1=
|border1=

|theme2=
|predicted2=
|sa2=
|eka-sa2=
|unknown2=
|border2=

    (same for theme3=, theme4=)
}}
{{Periodic table legend
|child=no
|caption=Example legend with three themes

|theme1=Category|predicted1=no|sa1=yes|eka-sa1=no|unknown1=yes
|theme2=State of matter|predicted2=no|sa2=yes|eka-sa2=no|unknown2=yes
|theme3=Occurrence|predicted3=no|sa3=yes|eka-sa3=no|unknown3=yes|border3=13
}}
Example legend with three themes
Metal Metalloid Nonmetal Unknown
chemical
properties
Alkali metal Alkaline earth metal Inner transition metal Transition metal Poor metal Polyatomic nonmetal Diatomic nonmetal Noble gas
Super­actinide Lan­thanide Actinide
Color of the atomic number shows state of matter (at 0 °C and 1 atm): black=Solid green=Liquid red=Gas grey=Unknown
Border shows natural occurrence of the element: Primordial From decay Synthetic Undiscovered

The following themes are recognised (note: the caption links are added here for ease)

|theme1=Category
|unknown1=yes
|predicted1=yes
|sa1=yes
|eka-sa1=yes
|text1=This is the legend theme "Category".
साँचा:Periodic table legend/Predicted
Metal Metalloid Nonmetal Unknown
chemical
properties
Alkali metal Alkaline earth metal Inner transition metal Transition metal Poor metal Polyatomic nonmetal Diatomic nonmetal Noble gas
Super­actinide Eka-super­actinide Lan­thanide Actinide
|theme1=Category compact
|unknown1=yes
|predicted1=yes
|sa1=yes
|eka-sa1=yes
साँचा:Periodic table legend/Predicted
क्षारीय धातु क्षारीय पार्थिव धातु Super­actinide Eka-super­actinide लैन्थनाइड ऐक्टिनाइड संक्रमण धातु संक्रमणोपरांत धातु उपधातुएँ बहुपरमाणुक अधातुएँ द्विपरमाणुक अधातुएँ निष्क्रिय गैस अज्ञात
रासायनिक
गुण
|theme1=State of matter
|predicted1=yes
|unknown1=yes
Color of the atomic number shows state of matter (at 0 °C and 1 atm): black=Solid green=Liquid red=Gas grey=Unknown
|theme1=Occurrence
|unknown1=yes
Border shows natural occurrence of the element: Primordial From decay Synthetic Undiscovered
|theme1=Valence
|unknown1=yes
Background color shows maximum valence of the chemical element: 0 1 2 3 4 5 6 7 8 Unknown
|theme1=Metal–nonmetal
|unknown1=yes
Background color shows metals and nonmetals in the periodic table: Metal Metalloid Nonmetal Unknown properties
|theme1=Block
|predicted1=yes
|unknown1=yes
Background color shows the block of the periodic table: s-block p-block d-block f-block
Predicted elements are coloured in a lighter shade: s-block p-block d-block f-block g-block
|theme1=Age of discovery
Background color shows age of discovery:
Antiquity to Middle Ages Middle Ages–​1799 1800–​1849 1850–​1899 1900–​1949 1950–​1999 Since 2000
(13 elements)
Antiquity to Middle Ages: unrecorded discoveries up into the Middle Ages
(21 elements)
Discoveries during the age of enlightenment
(24 elements)
Scientific and industrial revolutions
(26 elements)
The age of classifying elements; application of spectrum analysis techniques: Boisbaudran, Bunsen, Crookes, Kirchhoff, and others "hunting emission line signatures"
(13 elements)
Development of old quantum theory and quantum mechanics
(16 elements)
Post Manhattan project; synthesis of atomic numbers 98 and above (colliders, bombardment techniques)
(5 elements)
Recent synthesis
|theme1=Goldschmidt
Goldschmidt classification: Lithophile Siderophile Chalcophile Atmophile Synthetic
|caption=Janet category compact
|theme1=Janet category compact
Lan­thanide Actinide Transition metal Poor metal Metalloid Poly­atomic nonmetal Di­atomic nonmetal Noble gas Alkali metal Alkaline earth metal unknown chemical properties un­discovered
  • Subpages are spelled using
    ...
    
    , so we can have
    /Category
    
    and
    /Category/sandbox
    
    .

In development

  • For
    Category
    
    , it is possible to override the caption.

साँचा:Periodic table templates