==Units and prefixes==
{{Main|SI base unit|SI derived unit|SI prefix}}The International System of Units consists of a set of units together with a set of [[SI prefix|prefixes]]. The units are divided into two classes—'''base units''' and '''derived units'''. There are seven [[SI base unit|base units]], each representing, by convention, [[Dimensional analysis|different kinds of physical quantities]].
{| class="wikitable" style="margin:1em auto 1em auto"
|+ SI base units<ref name=sp330>{{Cite book|author=Barry N. Taylor & Ambler Thompson Ed. |title= The International System of Units (SI) |url=http://physics.nist.gov/Pubs/SP330/sp330.pdf |accessdate=18 June 2008|publisher=National Institute of Standards and Technology|location= Gaithersburg, MD|pages=23|year= 2008}}</ref><ref>[http://old.iupac.org/publications/books/author/mills.html Quantities Units and Symbols in Physical Chemistry], IUPAC</ref>
|-
!Unit name