18 Oct
2012
18 Oct
'12
12:21 p.m.
Le jeudi 18 octobre 2012, Alan BRASLAU a écrit :
> By the way, \lohi[left]{2}{4}He is somewhat a tautology, like all such
> isotopic nomenclature, as He ALWAYS has an atomic number of 2,
> otherwise it is not He (and U ALWAYS has an atomic number of 92,
> otherwise it is no longer U).
Sure but but the format is nevertheless usefull in some cases:
- exercises like: "what is the chemical symbol of the \lohi[left]{2}{4}X
atom?"
- nuclear reactions where Z are usefull to balance the equations (see
http://en.wikipedia.org/wiki/Nuclear_reaction for exemples). Of course if one
know every Z and atomic symbol associated by heart, the nomenclature with Z is
not needed.
--
Romain Diss