Batch A — Z = 1–20
- H — ¹H–⁷H
- He — ³He–¹⁰He
- Li — ⁴Li–¹³Li
- Be — ⁵Be–¹⁶Be
- B — ⁷B–²⁰B
- C — ⁸C–²²C
- N — ¹⁰N–²⁵N
- O — ¹¹O–²⁸O (unbound at the upper edge; ²⁷–²⁸O observed as unbound). (Wikipedia, Nature)
- F — ¹⁴F–³¹F
- Ne — ¹⁵Ne–³⁴Ne (stable: ²⁰Ne, ²¹Ne, ²²Ne). (Wikipedia)
- Na — ¹⁸Na–³⁷Na
- Mg — ¹⁹Mg–³⁹Mg
- Al — ²¹Al–⁴²Al
- Si — ²²Si–⁴⁴Si
- P — ²⁴P–⁴⁶P
- S — ²⁷S–⁵¹S
- Cl — ²⁸Cl–⁵¹Cl
- Ar — ³⁰Ar–⁵⁵Ar
- K — ³²K–⁵⁷K
- Ca — ³⁴Ca–⁶⁰Ca
Batch B — Z = 21–40
- Sc — ³⁶Sc–⁶²Sc
- Ti — ³⁸Ti–⁶⁵Ti
- V — ⁴⁰V–⁶⁷V
- Cr — ⁴²Cr–⁷⁰Cr
- Mn — ⁴⁴Mn–⁷²Mn
- Fe — ⁴⁵Fe–⁷²Fe
- Co — ⁴⁷Co–⁷⁵Co
- Ni — ⁴⁸Ni–⁷⁸Ni
- Cu — ⁵²Cu–⁸¹Cu
- Zn — ⁵⁴Zn–⁸⁵Zn
- Ga — ⁵⁶Ga–⁸⁷Ga
- Ge — ⁵⁸Ge–⁹⁰Ge
- As — ⁶⁰As–⁹²As
- Se — ⁶⁵Se–⁹⁹Se
- Br — ⁶⁷Br–¹⁰²Br
- Kr — ⁶⁹Kr–¹⁰⁷Kr
- Rb — ⁷¹Rb–¹⁰⁷Rb
- Sr — ⁷³Sr–¹¹¹Sr
- Y — ⁷⁶Y–¹¹³Y
- Zr — ⁷⁸Zr–¹¹⁴Zr
Batch C — Z = 41–60
- Nb — ⁸¹Nb–¹¹⁷Nb
- Mo — ⁸³Mo–¹²⁰Mo
- Tc — ⁸⁵Tc–¹²¹Tc
- Ru — ⁸⁷Ru–¹²³Ru
- Rh — ⁸⁹Rh–¹²⁵Rh
- Pd — ⁹¹Pd–¹²⁶Pd
- Ag — ⁹³Ag–¹³⁷Ag
- Cd — ⁹⁵Cd–¹³⁹Cd
- In — ⁹⁷In–¹⁴²In
- Sn — ⁹⁹Sn–¹⁴⁸Sn (Sn hosts the most known isotopes).
- Sb — ¹⁰³Sb–¹⁴⁹Sb
- Te — ¹⁰⁵Te–¹⁵²Te
- I — ¹⁰⁸I–¹⁵⁴I
- Xe — ¹¹⁰Xe–¹⁵⁷Xe (3 stable: ¹²⁶Xe, ¹²⁸Xe, ¹²⁹Xe… total stable set is larger; Xe has multiple stable nuclides).
- Cs — ¹¹²Cs–¹⁵⁹Cs
- Ba — ¹¹⁴Ba–¹⁶¹Ba
- La — ¹¹⁶La–¹⁶²La
- Ce — ¹¹⁹Ce–¹⁶³Ce
- Pr — ¹²¹Pr–¹⁶⁴Pr
- Nd — ¹²⁴Nd–¹⁶⁹Nd
Batch D — Z = 61–80
- Pm — ¹²⁶Pm–¹⁷⁰Pm
- Sm — ¹²⁸Sm–¹⁷²Sm
- Eu — ¹³⁰Eu–¹⁷³Eu
- Gd — ¹³⁴Gd–¹⁷⁷Gd
- Tb — ¹³⁵Tb–¹⁷⁶Tb
- Dy — ¹³⁸Dy–¹⁸¹Dy
- Ho — ¹⁴⁰Ho–¹⁸⁰Ho
- Er — ¹⁴³Er–¹⁸⁵Er
- Tm — ¹⁴⁵Tm–¹⁸⁵Tm
- Yb — ¹⁴⁹Yb–¹⁹⁰Yb
- Lu — ¹⁵⁰Lu–¹⁹¹Lu
- Hf — ¹⁵³Hf–¹⁹³Hf
- Ta — ¹⁵⁵Ta–¹⁹⁵Ta
- W — ¹⁵⁸W–¹⁹⁷W
- Re — ¹⁶⁰Re–¹⁹⁹Re
- Os — ¹⁶²Os–²⁰³Os
- Ir — ¹⁶⁵Ir–²⁰⁵Ir
- Pt — ¹⁶⁸Pt–²¹⁰Pt
- Au — ¹⁷⁰Au–²⁰⁹Au
- Hg — ¹⁷¹Hg–²¹⁴Hg
Batch E — Z = 81–100
- Tl — ¹⁷⁶Tl–²¹⁷Tl
- Pb — ¹⁷⁸Pb–²²⁰Pb
- Bi — ¹⁸⁴Bi–²²⁵Bi
- Po — ¹⁸⁸Po–²²⁹Po
- At — ¹⁹¹At–²²⁹At
- Rn — ¹⁹³Rn–²²⁹Rn
- Fr — ¹⁹⁹Fr–²³²Fr
- Ra — ²⁰¹Ra–²³⁶Ra
- Ac — ²⁰⁷Ac–²⁴⁰Ac
- Th — ²⁰⁹Th–²³⁷Th
- Pa — ²¹²Pa–²³⁵Pa
- U — ²¹⁷U–²⁴³U (naturally occurring: ²³⁴U, ²³⁵U, ²³⁸U). (IAEA)
- Np — ²²⁵Np–²⁴⁷Np
- Pu — ²²⁸Pu–²⁴⁸Pu
- Am — ²³¹Am–²⁴⁷Am
- Cm — ²³³Cm–²⁵⁰Cm
- Bk — ²³⁵Bk–²⁵⁰Bk
- Cf — ²³⁷Cf–²⁵²Cf
- Es — ²⁴⁰Es–²⁵⁴Es
- Fm — ²⁴²Fm–²⁵⁷Fm
Batch F — Z = 101–118 (transactinides & superheavy)
- Md — ²⁴⁵Md–²⁵⁸Md
- No — ²⁵⁰No–²⁶⁰No
- Lr — ²⁵¹Lr–²⁶²Lr
- Rf — ²⁵³Rf–²⁶⁵Rf
- Db — ²⁵⁵Db–²⁶⁷Db
- Sg — ²⁵⁸Sg–²⁷⁰Sg
- Bh — ²⁶⁰Bh–²⁷¹Bh
- Hs — ²⁶³Hs–²⁷⁴Hs
- Mt — ²⁶⁶Mt–²⁷⁵Mt
- Ds — ²⁶⁷Ds–²⁷⁷Ds
- Rg — ²⁷²Rg–²⁷⁹Rg
- Cn — ²⁷⁷Cn–²⁸³Cn
- Nh — ²⁷⁸Nh–²⁸⁴Nh
- Fl — ²⁸⁴Fl–²⁸⁹Fl
- Mc — ²⁸⁶Mc–²⁹⁰Mc (5 known; ²⁹⁰Mc longest-lived). (ChemLin)
- Lv — ²⁹⁰Lv–²⁹⁴Lv
- Ts — ²⁹³Ts–²⁹⁵Ts
- Og — ²⁹⁴Og–²⁹⁵Og (²⁹⁵Og tentative).
Notes & sources you can audit
- The IAEA LiveChart / ENSDF is the authoritative public database for known nuclides; it’s what this compact span view mirrors. (www-nds.iaea.org, IAEA)
- Specific light-element edge cases (e.g., O, Ne) are cross-checked with recent literature/wiki summaries for their upper/lower observed isotopes. (Wikipedia)
If you want these spans expanded into explicit, comma-separated isotope lists (e.g., ⁸C, ⁹C, ¹⁰C, …, ²²C) for all Z=1→118, say the word and I’ll dump the full catalog next—clean superscripts end to end.
Key terms in plain language
Open a term for a concise explanation of language used on this page.
Broadband
A general term for always-on, high-speed Internet access. Broadband can be delivered over fiber, cable, DSL, fixed wireless, cellular, or satellite networks.
Cloud Computing
Computing resources—such as applications, servers, storage, or databases—delivered from remote infrastructure and scaled as requirements change.
Cybersecurity
The practices and controls used to protect identities, devices, networks, applications, and data from unauthorized access, disruption, or manipulation.
Identity and Access Management (IAM)
The systems and policies that determine who a user is, what resources they may access, and how that access is authenticated and reviewed.
API
An application programming interface is a defined way for software systems to exchange data or request functions from one another.
Artificial Intelligence (AI)
Software designed to perform tasks involving prediction, classification, generation, reasoning, or decision support. Business use still requires clear data, governance, security, and human accountability.