سانچہ:Chem

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

Template instructions

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

{{chem|H|2|O}}

will yield:

H
2O

Algebraic expression as subscript

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

{{chem|C|''n''|H|2''n''+2}}

gives

C
nH
2n+2

Charge

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

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

yields a "+" as superscript:

H
3O+

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
2He

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. The Chem2 template can be used for e.g. ¹H₂¹⁶O, heavy water.

See also {{Nuclide}}

Linking

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

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

will yield:

H
2O

Individual elements can be linked in the following manner:

{{chem|[[ہائیڈروجن]]|2|[[آکسیجن]]}}

gives

ہائیڈروجن
2

Notes

• To include "=" in the formula, use "=" For example, "{{chem|CH|2|=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≡CH}}" yields HC≡CH.
• The template accepts up to twenty parameters in addition to link.
• This template uses {{su}}.