
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 same chemical …
Isotope | Examples & Definition | Britannica
Dec 12, 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 identical chemical …
ISOTOPE Definition & Meaning - Merriam-Webster
The meaning of ISOTOPE is any of two or more species of atoms of a chemical element with the same atomic number and nearly identical chemical behavior but with differing atomic mass or mass …
What Is an Isotope? Definition and Examples
Sep 13, 2019 · Isotopes share the same chemical properties but may have different nuclear stability and physical properties. Some isotopes are stable, while others are radioactive and undergo decay. …
What are Isotopes? | IAEA
Aug 19, 2022 · Like everything we see in the world, isotopes are a type of atom, the smallest unit of matter that retains all the chemical properties of an element. Isotopes are forms of a chemical …
What is an Isotope? - ChemTalk
What is an isotope? An isotope is an atom that has the same number of protons and a different number of neutrons. The atom is still considered the same element (still contains the same number of …
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.
ISOTOPE Definition & Meaning | Dictionary.com
ISOTOPE definition: any of two or more forms of a chemical element, having the same number of protons in the nucleus, or the same atomic number, but having different numbers of neutrons in the …
What Is an Isotope? A Simple Definition and Explanation
Aug 31, 2025 · Understanding isotopes sheds light on the subtle diversity within the atomic world. Isotopes are different versions of the same chemical element. They are atoms with the same number …
ISOTOPE | definition in the Cambridge English Dictionary
Add to word list physics, chemistry a form of an atom which has a different atomic mass from other forms of the same atom but the same chemical structure (Definition of isotope from the Cambridge …