The establishment of EVISA is funded by the EU through
the Fifth Framework Programme (G7RT- CT- 2002- 05112).
Supporters of EVISA includes:
The nominal atomic weight of an isotope is given by the sum of the
number of neutrons and protons in each nucleus. The exact atomic weight
differs fractionally from that whole number, because neutrons are
slightly heavier than protons and the mass of the nucleus is also
affected by the binding energy.
The term "atomic weight" was found in the following pages: