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Template:Chem

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This template allows you to render chemical formula's using HTML. Alternatively, you can use <chem>...</chem>, using mhchem LaTeX notation to generate formulae.

Template instructions

This template, {{chem}}, serves to simplify the writing of chemical formulae. For example,

{{chem|H|2|O}}

will yield:

H
2
O

Algebraic expression as subscript

Algebraic expressions are rendered as subscripts (but must not contain upper case letters).

{{chem|C|''n''|H|2''n''&nbsp;+&nbsp;2}}

gives

C
n
H
2n + 2

Charge

Ion charge superscripts (for: +/-) are also supported:

{{chem|H|3|O|+}}

yields a "+" as superscript:

H
3
O+

Simultaneous subscripts/superscripts are automatically handled (use a hyphen for the minus sign):

{{chem|SO|4|2-}}

gives "2-" as superscript:

SO2−
4

The hyphen is converted to a true minus sign.

Atomic number and mass number

The first parameter can be used for mass number.

{{chem|4|He}}

gives:

4
He

The first two parameters can be used for mass number and atomic number.

{{chem|4|2|He}}

gives:

4
2
He
Note
Only the first two parameters can handle two consecutive plain numbers (i.e. without a plus sign or a hyphen (+ or -) following). Otherwise the template will loop.
See also {{Nuclide2}}

Linking

The optional parameter link changes the formula into a link. For example:

{{chem|link=water|H|2|O}}

will yield:

H
2
O

Individual elements can be linked in the following manner:

{{chem|[[Hydrogen|H]]|2|[[Oxygen|O]]}} 

gives

H
2
O

Notes

  • To include "=" in the formula, use "&#61;" For example, "{{chem|CH|2|&#61;CH|2}}" yields CH
    2
    =CH
    2
    .
    • Or, don't use this template. For example, "CH<sub>2</sub>=CH<sub>2</sub>" yields CH2=CH2.
  • To include "≡" in the formula, use "≡" For example, "{{chem|HC&#8801;CH}}" yields HC≡CH.
  • The template accepts up to twenty parameters in addition to link.
  • This template uses {{su}}.

See also

TemplateData

This is the TemplateData documentation for this template used by VisualEditor and other tools; see the monthly error report for this template.

TemplateData for Chem

Template data

Render chemical formula's using HTML. Alternatively, you can use <chem>...</chem>, using mhchem LaTeX notation to generate formulae. Up to 25 unnamed ordered parameters can be used with automatic detection of subscripts and superscripts.

Template parameters

This template prefers inline formatting of parameters.

ParameterDescriptionTypeStatus
Linklink

Make the formula link to an article

Example
Water
Pageoptional
11

no description

Unknownoptional
22

no description

Unknownoptional
33

no description

Unknownoptional
44

no description

Unknownoptional
55

no description

Unknownoptional
66

no description

Unknownoptional
77

no description

Unknownoptional
88

no description

Unknownoptional
99

no description

Unknownoptional
1010

no description

Unknownoptional
1111

no description

Unknownoptional
1212

no description

Unknownoptional
1313

no description

Unknownoptional
1414

no description

Unknownoptional
1515

no description

Unknownoptional
1616

no description

Unknownoptional
1717

no description

Unknownoptional
1818

no description

Unknownoptional
1919

no description

Unknownoptional
2020

no description

Unknownoptional
2121

no description

Unknownoptional
2222

no description

Unknownoptional
2323

no description

Unknownoptional
2424

no description

Unknownoptional