| $(i) \ { }_{26} Fe ^{54}, { }_{26} Fe ^{56}, { }_{26} Fe ^{57}, { }_{26} Fe ^{58}$ | $(a)$ समस्थानिक (Isotopes) |
| $(ii) \ { }_1 H ^3, { }_2 He ^3$ | $(b)$ समन्यूट्रॉनिक (Isotones) |
| $(iii) \ { }_{32} Ge ^{76}, { }_{33} As ^{77}$ | $(c)$ आइसोडायाफर्स (Isodiaphers) |
| $(iv) \ { }_{92} U ^{235}, { }_{90} Th ^{231}$ | $(d)$ समभारिक (Isobars) |
| $(v) \ { }_1 H ^1, { }_1 D ^2, { }_1 T^3$ |
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