Mercury (Z = 80, A = 171–206)

¹⁷¹Hg — Unstable · t½ ≈ 120 ms · Decay: β⁺ → ¹⁷¹Au · Type: synthetic · Uses: research.
¹⁷²Hg — Unstable · t½ ≈ 200 ms · Decay: β⁺ → ¹⁷²Au · Type: synthetic · Uses: research.
¹⁷³Hg — Unstable · t½ ≈ 300 ms · Decay: β⁺ → ¹⁷³Au · Type: synthetic · Uses: research.
¹⁷⁴Hg — Unstable · t½ ≈ 540 ms · Decay: β⁺ → ¹⁷⁴Au · Type: synthetic · Uses: research.
¹⁷⁵Hg — Unstable · t½ ≈ 600 ms · Decay: β⁺ → ¹⁷⁵Au · Type: synthetic · Uses: research.
¹⁷⁶Hg — Unstable · t½ ≈ 1.2 s · Decay: β⁺ → ¹⁷⁶Au · Type: synthetic · Uses: research.
¹⁷⁷Hg — Unstable · t½ ≈ 2.0 s · Decay: β⁺ → ¹⁷⁷Au · Type: synthetic · Uses: research.
¹⁷⁸Hg — Unstable · t½ ≈ 2.5 s · Decay: β⁺ → ¹⁷⁸Au · Type: synthetic · Uses: research.
¹⁷⁹Hg — Unstable · t½ ≈ 3.0 s · Decay: β⁺ → ¹⁷⁹Au · Type: synthetic · Uses: research.
¹⁸⁰Hg — Unstable · t½ ≈ 4.0 s · Decay: β⁺ → ¹⁸⁰Au · Type: synthetic · Uses: research.
¹⁸¹Hg — Unstable · t½ ≈ 3.6 s · Decay: β⁺ → ¹⁸¹Au · Type: synthetic · Uses: research.
¹⁸²Hg — Unstable · t½ ≈ 4.9 s · Decay: β⁺ → ¹⁸²Au · Type: synthetic · Uses: research.
¹⁸³Hg — Unstable · t½ ≈ 10.8 s · Decay: β⁺ → ¹⁸³Au · Type: synthetic · Uses: research.
¹⁸⁴Hg — Unstable · t½ ≈ 30.6 s · Decay: β⁺ → ¹⁸⁴Au · Type: synthetic · Uses: research.
¹⁸⁵Hg — Unstable · t½ ≈ 49.0 s · Decay: β⁺ → ¹⁸⁵Au · Type: synthetic · Uses: research.
¹⁸⁶Hg — Unstable · t½ ≈ 1.4 min · Decay: β⁺ → ¹⁸⁶Au · Type: synthetic · Uses: research.
¹⁸⁷Hg — Unstable · t½ ≈ 2.4 min · Decay: β⁺ → ¹⁸⁷Au · Type: synthetic · Uses: research.
¹⁸⁸Hg — Unstable · t½ ≈ 3.3 min · Decay: β⁺ → ¹⁸⁸Au · Type: synthetic · Uses: research.
¹⁸⁹Hg — Unstable · t½ ≈ 7.6 min · Decay: β⁺ → ¹⁸⁹Au · Type: synthetic · Uses: research.
¹⁹⁰Hg — Unstable · t½ ≈ 20.0 min · Decay: β⁺ → ¹⁹⁰Au · Type: synthetic · Uses: research.
¹⁹¹Hg — Unstable · t½ ≈ 49.0 min · Decay: β⁺ → ¹⁹¹Au · Type: synthetic · Uses: research.
¹⁹²Hg — Unstable · t½ ≈ 4.8 h · Decay: β⁺ → ¹⁹²Au · Type: tracer · Uses: nuclear research.
¹⁹³Hg — Unstable · t½ ≈ 3.8 h · Decay: β⁺ → ¹⁹³Au · Type: tracer · Uses: nuclear research.
¹⁹⁴Hg — Unstable · t½ ≈ 11.8 h · Decay: β⁺ → ¹⁹⁴Au · Type: tracer · Uses: nuclear research.
¹⁹⁵Hg — Unstable · t½ ≈ 10.5 h · Decay: β⁺ → ¹⁹⁵Au · Type: tracer · Uses: nuclear research.
¹⁹⁶Hg — Unstable · t½ ≈ 8.1 h · Decay: β⁻ → ¹⁹⁶Tl · Type: tracer · Uses: nuclear medicine.
¹⁹⁷Hg — Unstable · t½ ≈ 64.1 h · Decay: β⁻ → ¹⁹⁷Tl · Type: tracer · Uses: tracer studies.
¹⁹⁸Hg — Stable · — · Type: stable (primordial, ~9.97%) · Uses: isotope tracer, geochemistry.
¹⁹⁹Hg — Stable · — · Type: stable (primordial, ~16.9%) · Uses: isotope tracer, NMR studies.
²⁰⁰Hg — Stable · — · Type: stable (primordial, ~23.1%) · Uses: isotope tracer, geochemistry.
²⁰¹Hg — Stable · — · Type: stable (primordial, ~13.2%) · Uses: isotope tracer.
²⁰²Hg — Stable · — · Type: stable (primordial, ~29.7%) · Uses: isotope tracer.
²⁰³Hg — Unstable · t½ ≈ 46.6 d · Decay: β⁻ → ²⁰³Tl · Type: tracer · Uses: environmental tracer.
²⁰⁴Hg — Stable · — · Type: stable (primordial, ~6.9%) · Uses: isotope tracer.
²⁰⁵Hg — Unstable · t½ ≈ 5.0 min · Decay: β⁻ → ²⁰⁵Tl · Type: synthetic · Uses: research.
²⁰⁶Hg — Unstable · t½ ≈ 8.3 min · Decay: β⁻ → ²⁰⁶Tl · Type: synthetic · Uses: research.

Mercury — isotope count: 36 total · Stable: 7 (¹⁹⁸Hg, ¹⁹⁹Hg, ²⁰⁰Hg, ²⁰¹Hg, ²⁰²Hg, ²⁰⁴Hg) · Unstable: 29.
(Data: IAEA LiveChart, NUBASE2020, ENSDF; notable applications: stable Hg isotopes in geochemistry and nuclear science, ¹⁹⁶Hg in medicine, ²⁰³Hg in environmental tracing, ¹⁹⁹Hg in NMR.)

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.