قالب:Chem

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 Template instructions

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

Note

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:

42He

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.

 Linking

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

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

will yield:

H 2O

For linking individual elements can be linked in the following manner.

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

gives

H 2O

 Notes

• To include "=" in the formula, use = For example, {{chem|CH|2|=CH|2}} yields CH 2=CH 2.
  • Or, {{chem|CH|2}}={{chem|CH|2}}, which 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-four parameters in addition to link.
• This template uses {{su}}.

 TemplateData

This is the TemplateData documentation for this template used by VisualEditor and other tools.

Chem

Encodes a chemical formula. This template make use of overloading so it cannot be easily documented for VisualEditor. Each parameter can be a chemical element symbol like 'Si'; a number or algebraic expressions (2''n'' + 2) – rendered as subscripts; charges '+', '-', '2+' etc. – rendered as superscripts. Additionally the first parameters can be mass number and atomic weight.

وسائط القالب

وسيط		وصف	نوع	حالة
1	1	Either a chemical symbol 'H' rendered normally, or a mass number rendered as a superscript.	نص	مطلوب
2	2	Either a chemical symbol 'H' rendered normally, or a numeric atomic weight rendered as a subscript.	نص	اختياري
3	3	Either a chemical symbol 'H' rendered normally, a number or formula rendered as a subscript, or a charge renderer as a superscript.	نص	اختياري
4	4		نص	اختياري
5	5		نص	اختياري
6	6		نص	اختياري
7	7		نص	اختياري
8	8		نص	اختياري
9	9		نص	اختياري
10	10		نص	اختياري
11	11		نص	اختياري
12	12		نص	اختياري
13	13		نص	اختياري
14	14		نص	اختياري
15	15		نص	اختياري
16	16		نص	اختياري
17	17		نص	اختياري
18	18		نص	اختياري
19	19		نص	اختياري
20	20		نص	اختياري
21	21		نص	اختياري
22	22		نص	اختياري
23	23		نص	اختياري
24	24		نص	اختياري
link	link	A page to link to e.g. 'Water'.	نص	اختياري