What is the difference between isotopes and isobars?

Isotopes and isobars are types of atoms that differ based on their atomic number and mass number. Isotopes have the same atomic number but different mass numbers, while isobars have the same mass number but different atomic numbers.

Isotopes are atoms of the same element that contain the same number of protons but a different number of neutrons. For example, hydrogen isotopes such as protium (¹H), deuterium (²H), and tritium (³H) have the same atomic number but different masses.

Isobars are atoms of different elements that have the same mass number but different numbers of protons. For example, argon-40 (⁴⁰Ar) and calcium-40 (⁴⁰Ca) are isobars.

Understanding isotopes and isobars helps students learn atomic structure, nuclear chemistry, and how differences in protons and neutrons affect atomic properties.