Isotopes are variants of a particular chemical element that differ in neutron number, while having the same number of protons. They possess identical atomic numbers but different mass numbers due to the variance in neutrons.
Related terms
Atomic number: The total count of protons in the nucleus of an atom, defining the chemical element.
Mass number: The sum of protons and neutrons in an atom's nucleus, determining its mass.
Radioisotope: An isotope that is radioactive, often used in scientific research and medical applications