The canonical data come from NUBASE2020 and the IAEA’s LiveChart of Nuclides (so these are experimentally confirmed counts, not just predictions).
Light Elements
- Hydrogen (Z=1)7 isotopes (^1H–^7H)
- Helium (Z=2)10 isotopes (^2He–^10He)
- Lithium (Z=3)11 isotopes (^3Li–^13Li)
- Beryllium (Z=4)12 isotopes (^5Be–^16Be)
- Boron (Z=5)14 isotopes (^7B–^20B)
- Carbon (Z=6)15 isotopes (^8C–^22C)
- Nitrogen (Z=7)16 isotopes (^10N–^25N)
- Oxygen (Z=8)17 isotopes (^12O–^28O)
- Fluorine (Z=9)16 isotopes (^14F–^29F)
- Neon (Z=10)20 isotopes (^16Ne–^35Ne)
Elements 11–20
- Sodium (Z=11)20 isotopes (^18Na–^37Na)
- Magnesium (Z=12)21 isotopes (^19Mg–^39Mg)
- Aluminum (Z=13)22 isotopes (^21Al–^42Al)
- Silicon (Z=14)23 isotopes (^22Si–^44Si)
- Phosphorus (Z=15)23 isotopes (^24P–^46P)
- Sulfur (Z=16)25 isotopes (^27S–^51S)
- Chlorine (Z=17)24 isotopes (^28Cl–^51Cl)
- Argon (Z=18)26 isotopes (^30Ar–^55Ar)
- Potassium (Z=19)26 isotopes (^32K–^57K)
- Calcium (Z=20)27 isotopes (^34Ca–^60Ca)
Transition Metals (samples)
- Iron (Z=26)28 isotopes (^45Fe–^72Fe)
- Nickel (Z=28)31 isotopes (^48Ni–^78Ni)
- Copper (Z=29)30 isotopes (^52Cu–^81Cu)
- Zinc (Z=30)32 isotopes (^54Zn–^85Zn)
Mid-range
- Tin (Z=50)39 isotopes (^99Sn–^137Sn) → record holder for most isotopes of any element
- Tellurium (Z=52)38 isotopes (^105Te–^142Te)
- Xenon (Z=54)40 isotopes (^110Xe–^149Xe)
Heavy Elements
- Lead (Z=82)43 isotopes (^178Pb–^220Pb)
- Bismuth (Z=83)41 isotopes (^184Bi–^224Bi)
- Polonium (Z=84)42 isotopes (^188Po–^229Po)
- Uranium (Z=92)29 isotopes (^217U–^245U)
Superheavy Elements
- Rutherfordium (Z=104): 13 isotopes confirmed (^253Rf–^267Rf)
- Oganesson (Z=118): 2 isotopes confirmed (^294Og, ^295Og tentative)
🧮 Totals
- Stable isotopes~251 (depending on definition of stability).
- All experimentally known isotopes (2020 NUBASE cut)3,340.
- Predicted bound isotopes (models to drip lines, Z ≤ 120)~7,000.
✅ So, each element spans a range of A-values (mass numbers), with “isotope counts” depending on how wide that range is. The middle of the periodic table (Sn, Xe, Ba, Pb) has the richest isotopic families.
📊 Isotope Summary Table (Z = 1 → 118) – SolveForce Communications
Harmonizing Artificial Intelligence, Cybersecurity and Networks – SolveForce Communications
Isotope Master Summary (Z = 1 → 118) – SolveForce Communications
Welcome to Adaptive Energy Systems (AES™)
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