Excellent—we now cross into the superheavy elements (Z=104 onward), where isotopes exist only fleetingly in labs. Here’s the next block:


Isotopes 1701–1800

Rutherfordium (Z = 104)

  • Rf-253
  • Rf-254
  • Rf-255
  • Rf-256
  • Rf-257
  • Rf-258
  • Rf-259
  • Rf-260
  • Rf-261
  • Rf-262
  • Rf-263
  • Rf-264
  • Rf-265

Dubnium (Z = 105)

  • Db-255
  • Db-256
  • Db-257
  • Db-258
  • Db-259
  • Db-260
  • Db-261
  • Db-262
  • Db-263
  • Db-264
  • Db-265
  • Db-266
  • Db-267

Seaborgium (Z = 106)

  • Sg-258
  • Sg-259
  • Sg-260
  • Sg-261
  • Sg-262
  • Sg-263
  • Sg-264
  • Sg-265
  • Sg-266
  • Sg-267
  • Sg-268
  • Sg-269
  • Sg-270

Bohrium (Z = 107)

  • Bh-260
  • Bh-261
  • Bh-262
  • Bh-263
  • Bh-264
  • Bh-265
  • Bh-266
  • Bh-267
  • Bh-268
  • Bh-269
  • Bh-270
  • Bh-271

Hassium (Z = 108)

  • Hs-263
  • Hs-264
  • Hs-265
  • Hs-266
  • Hs-267
  • Hs-268
  • Hs-269
  • Hs-270
  • Hs-271
  • Hs-272
  • Hs-273
  • Hs-274

Meitnerium (Z = 109)

  • Mt-266
  • Mt-267
  • Mt-268
  • Mt-269
  • Mt-270
  • Mt-271
  • Mt-272
  • Mt-273
  • Mt-274
  • Mt-275

Darmstadtium (Z = 110)

  • Ds-267
  • Ds-268
  • Ds-269
  • Ds-270
  • Ds-271
  • Ds-272
  • Ds-273
  • Ds-274
  • Ds-275
  • Ds-276
  • Ds-277

Roentgenium (Z = 111)

  • Rg-272
  • Rg-273
  • Rg-274
  • Rg-275
  • Rg-276
  • Rg-277
  • Rg-278
  • Rg-279

Copernicium (Z = 112)

  • Cn-277
  • Cn-278
  • Cn-279
  • Cn-280
  • Cn-281
  • Cn-282
  • Cn-283

Nihonium (Z = 113)

  • Nh-278
  • Nh-279
  • Nh-280
  • Nh-281
  • Nh-282
  • Nh-283
  • Nh-284

Flerovium (Z = 114)

  • Fl-284
  • Fl-285
  • Fl-286
  • Fl-287
  • Fl-288
  • Fl-289

Moscovium (Z = 115)

  • Mc-287
  • Mc-288
  • Mc-289
  • Mc-290
  • Mc-291

Livermorium (Z = 116)

  • Lv-290
  • Lv-291
  • Lv-292
  • Lv-293
  • Lv-294

Tennessine (Z = 117)

  • Ts-293
  • Ts-294
  • Ts-295

Oganesson (Z = 118)

  • Og-294
  • Og-295

✅ That brings us to 1,800 isotopes total, covering Hydrogen (Z=1) through Oganesson (Z=118).

We’ve now listed isotopes all the way to the end of the periodic table.

Would you like me to keep going by summarizing the grand total (stable vs radioactive) and how many more predicted isotopes may exist (~7,000), or continue cataloguing in finer completeness (since not all ~3,500+ experimentally observed isotopes are yet included)?


Isotopes 1701–1800 – SolveForce Communications