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{{main|Centiare:Technical terms and definitions}}

{{main|Centiare:Technical terms and definitions}}

   

   

*For [[Units of measurement|unit]]s of measure, use [[SI]] units as the main units in science articles, unless there are compelling historical or pragmatic reasons not to do so (for example, [[Hubble's constant|Hubble’s constant]] should be quoted in its most common unit of ([[Kilometre|km]]/[[Second|s]])/[[Megaparsec|Mpc]] rather than its SI unit of s⁻¹). For other articles, [[Imperial unit|Imperial]], [[United States customary units |U.S. customary]], or [[Metric system|metric]] units may be used as the main units of measurement. See [[Wikipedia:Manual of Style (dates and numbers)#Units of measurement]] for further guidance. The Wikipedia rule for commas and periods in numbers is, for example 12,345,678.901 — contrary to Continental style.

*For [[Units of measurement|unit]]s of measure, use [[SI]] units as the main units in science articles, unless there are compelling historical or pragmatic reasons not to do so (for example, [[Hubble's constant|Hubble’s constant]] should be quoted in its most common unit of ([[Kilometre|km]]/[[Second|s]])/[[Megaparsec|Mpc]] rather than its SI unit of s⁻¹). For other articles, [[Imperial unit|Imperial]], [[United States customary units |U.S. customary]], or [[Metric system|metric]] units may be used as the main units of measurement. See [[Centiare:Manual of Style (dates and numbers)#Units of measurement]] for further guidance. The Centiare rule for commas and periods in numbers is, for example 12,345,678.901 — contrary to Continental style.

*In articles about [[chemical]]s and [[chemistry]], use the style of the [[IUPAC|International Union of Pure and Applied Chemistry]] (IUPAC) for chemical names wherever possible except in article titles, where the common name should be used if different followed by mention of the IUPAC name.  For general information see [[systematic name]], and for organic compounds in particular see [[IUPAC nomenclature]].

*In articles about [[chemical]]s and [[chemistry]], use the style of the [[IUPAC|International Union of Pure and Applied Chemistry]] (IUPAC) for chemical names wherever possible except in article titles, where the common name should be used if different followed by mention of the IUPAC name.  For general information see [[systematic name]], and for organic compounds in particular see [[IUPAC nomenclature]].

*In [[periodic table group]]s, use the <!--if you want to say “new” here, please follow the section in this manual about avoiding the word ''new''-->IUPAC names (these use [[Arabic numerals|Hindu-Arabic numerals]], not [[Roman numerals]] or letters).

*In [[periodic table group]]s, use the <!--if you want to say “new” here, please follow the section in this manual about avoiding the word ''new''-->IUPAC names (these use [[Arabic numerals|Hindu-Arabic numerals]], not [[Roman numerals]] or letters).