About 672,000 results
Open links in new tab
  1. Isotope - Wikipedia

    From left to right, the isotopes are protium (1 H) with 0 neutrons, deuterium (2 H) with 1 neutron, and tritium (3 H) with 2 neutrons. Isotopes are distinct nuclear species (or nuclides) of the …

  2. Isotope | Examples & Definition | Britannica

    Sep 3, 2025 · What is an isotope? An isotope is one of two or more species of atoms of a chemical element with the same atomic number and position in the periodic table and nearly …

  3. What Is an Isotope? Definition and Examples

    Sep 13, 2019 · An isotope is one of two or more forms of an element that have the same number of protons but different numbers of neutrons in the nucleus. Because they have the same …

  4. What is an Isotope? - ChemTalk

    In this concept tutorial, learn about what an isotope is, some common isotopes and their uses, and how isotopes form and breakdown.

  5. Isotope Basics | NIDC: National Isotope Development Center

    Isotopes are atoms of the same element that have the same number of protons (i.e., atomic number, "Z") but a different number of neutrons, meaning that their mass number, "A", varies. …

  6. Isotopes: Definition, Meaning, Examples, Uses - Scienly

    Sep 22, 2024 · Definition: Atoms of an element which have the same atomic number but different mass numbers are called isotopes of that element. These isotopes are variants of the same …

  7. Isotope Basics | Types, Uses & Differences

    May 29, 2024 · Isotopes are variants of a particular chemical element that share the same number of protons but differ in the number of neutrons. This fundamental concept is crucial in various …

  8. DOE Explains...Isotopes - Department of Energy

    Isotopes are members of a family of an element that all have the same number of protons but different numbers of neutrons. The number of protons in a nucleus determines the element’s …

  9. Isotope Notation — Overview & Examples - Expii

    Isotopes are atoms that have the same atomic number but different mass numbers due to the different number of neutrons they contain. There could be two or more isotopes that fall under …

  10. What is an isotope?

    To understand nuclear issues, you must have a basic understanding of what exactly an isotope is. This page describes what isotopes are and why they are important.