Note: The prefixes and their symbols listed in Schedule 2 may be used in conjunction with these two units and with their symbols.,
Energy,Electronvolt,eV,The electron volt is the kinetic energy acquired by an electron in passing through a potential difference of 1 volt in vacuum.,
Mass,Unified atomic mass unit,u,The unified atomic mass unit is equal to 1/12 of the mass of an atom of the nuclide 12 C,

10 24,yotta,Y,10 −1,deci,d,
10 21,zetta,Z,10 − 2,centi,c,
10 18,exa,E,10 −3,milli,m,
10 15,peta,P,10 − 6,micro,μ,
10 12,tera,T,10 −9,nano,n,
10 9,giga,G,10 −12,pico,p,
10 6,mega,M,10 −15,femto,f,
10 3,kilo,k,10 − 18,atto,a,
10 2,hecto,h,10 − 21,zepto,z,
10 1,deca,da,10 −24,yocto,y,
ISBN Number,
BS 5775,
,Part 0,058022194 6,
,Part 1,058021995 X,
,Part 2,058021996 8,
,Part 3,058021997 6,
,Part 4,058021998 4,
,Part 5,058021999 2,
,Part 6,058022000 1,
,Part 7,058022001 X,
,Part 8,058022195 4,
,Part 9,058022002 8,
,Part 10,058022003 6,
,Part 11,058021799 X,
,Part 12,058022004 4,
,Part 13,058022005 2,