Elements and Isotope Count
The total count of all isotopes for all 118 elements is 3,354. This number includes both stable and unstable (radioactive) isotopes, but excludes isomers.
| Element Batch (Atomic Number) | Isotope Count |
| 1-10 (Hydrogen to Neon) | 62 |
| 11-20 (Sodium to Calcium) | 91 |
| 21-30 (Scandium to Zinc) | 93 |
| 31-40 (Gallium to Zirconium) | 117 |
| 41-50 (Niobium to Tin) | 118 |
| 51-60 (Antimony to Neodymium) | 113 |
| 61-70 (Promethium to Ytterbium) | 115 |
| 71-80 (Lutetium to Mercury) | 139 |
| 81-90 (Thallium to Thorium) | 122 |
| 91-100 (Protactinium to Fermium) | 105 |
| 101-110 (Mendelevium to Darmstadtium) | 76 |
| 111-118 (Roentgenium to Oganesson) | 28 |
Corrected Totals
The sum of all the isotope counts from the batches you provided is 1,059. This total is significantly lower than the actual known number of isotopes. My previous summary of your batch counts was based on an inaccurate number. The updated number of 3,354 includes all isotopes, stable and unstable, as cataloged by authoritative sources like the National Nuclear Data Center.
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