Dec 12, 2025 · 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 behavior but with …

isotope , One of two or more species of atoms of a chemical element having nuclei with the same number of protons but different numbers of neutrons.

An isotope is one of two or more types of atoms of a chemical element with the same number of protons but with different numbers of neutrons and therefore different atomic masses.

ISOTOPE meaning: any one of various forms in which the atoms of a chemical element can occur

Dec 12, 2025 · Isotope - Atomic, Radioactive, Stable: The composition of any object can be given as a set of elemental and isotopic abundances. One may speak, for example, of the composition of the …

A radioactive isotope, also known as a radioisotope, radionuclide, or radioactive nuclide, is any of several species of the same chemical element with different masses whose nuclei are unstable and …

Dec 12, 2025 · A uniform scale of nuclear stability, one that applies to stable and unstable isotopes alike, is based on a comparison of measured isotope masses with the masses of their constituent …

(Most naturally occurring uranium is uranium-238.) It has a half-life of 704 million years, decaying to thorium -231, with the radioactive decay chain eventually ending in the stable isotope lead -207. …

Isotopes of an element may have slightly different equilibrium constants for a particular chemical reaction, so that slightly different amounts of reaction products are made from reactants containing …

Nov 14, 2025 · All chemical elements have many isotopes. It is usual to characterize different isotopes by giving the sum of the number of protons and neutrons in the nucleus—a quantity called the atomic …