In science, en can refer to the prefix en- (Greek) meaning "in" or "within" or or alternatively "to go into" or "cause to be", depending, as in en-ergon (work), en-tropy (entropy), or en-ergy (energy); or the abbreviation EN (technical) maning exponent E to the power of some number N.

The term EN is sometimes found as an old-fashioned short notation scheme for exponent E to the power of some number N, which is written formulaically as follows:

 \text{EN} = 10^N \,

where N is a positive number. If N equals 22, for example:

 \text{E22} = 10^{22} \,

This notation scheme is useful in expressing shorthand notation for numbers of atoms in a human molecule which can reach upwards E27, depending on atom, such as hydrogen or oxygen. Hence, for instance, the notation:

Zn_{10,000,000,000,000,000,000,000} \,

become shortened to:


or in subscript notation:

 Z_{E22} \,

or in Latex notation:

 Z_{10^{22}} \,

all of which are equivalent, which signify that there are 10 sextillion Zinc atoms in the average human molecule.

See also
‚óŹ Number of atoms in

TDics icon ns

More pages