Nuclido

${\displaystyle {}_{Z}^{A}\mathrm {X} }$

• A = summa de quantitate de protones e quantitate de neutrones
• Z = quantitate de protones

Nomine	Definition	Exemplo	Commento
Isotopo	mesme quantitate de protones (Z)	${\displaystyle {}_{\ 6}^{12}\mathrm {C} ,{}_{\ 6}^{13}\mathrm {C} }$
Isotono	mesme quantitate de neutrones (A-Z)	${\displaystyle {}_{\ 6}^{13}\mathrm {C} ,{}_{\ 7}^{14}\mathrm {N} }$
Isobaro	mesme summa de quantitate de protones e quantitate de neutrones (A)	${\displaystyle {}_{\ 7}^{17}\mathrm {N} ,{}_{\ 8}^{17}\mathrm {O} ,{}_{\ 9}^{17}\mathrm {F} }$
?	?	${\displaystyle {}_{1}^{3}\mathrm {H} ,{}_{2}^{3}\mathrm {He} }$	subclasse de isobaro
Isodiaphero	mesme surplus de neutrones (A-2Z)	${\displaystyle {}_{\ 6}^{12}\mathrm {C} ,{}_{\ 7}^{14}\mathrm {N} }$
Isomero	mesme quantitate de protones e mesme quantitate de neutrones e mesme stato interne	${\displaystyle {}_{43}^{99}\mathrm {Tc} }$ != ${\displaystyle {}_{\ \ 43}^{99\mathrm {m} }\mathrm {Tc} }$