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Abbreviated list of quantities, units and symbols in physical chemistry

 2. SI prefixes

Prefixes to form the names and symbols of the decimal multiples and submultiples of SI units.*

Multiple Prefix Symbol
10-24 yocto  y
10-21 zepto z
10-18 atto a
10-15 femto f
10-12 pico p
10-9 nano n
10-6 micro  µ
10-3 milli m
10-2 centi c
10-1 deci d
10 deca da
102 hecto h
103 kilo k
106 mega M
109 giga G
1012 tera T
1015 peta P
1018 exa E
1021 zeta Z
1024 yotta Y

* Decimal multiple and submultiples of the unit of mass are formed by attaching prefixes to gram, examples: mg, not µkg; Mg, not kkg.


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