What makes an atom an isotope?
William Rodriguez
Updated on April 08, 2026
Simply so, how does an atom become an isotope?
If an atom were to gain or lose neutrons it becomes an isotope. If it gains a neutron it become an isotope called deuterium. Since the atomic mass is the total of the number of protons and neutrons, an isotope would have a different atomic mass, but the same atomic number as the original atom.
Subsequently, question is, what is an isotope easy definition? isotope. An isotope of a chemical element is an atom that has a different number of neutrons (that is, a greater or lesser atomic mass) than the standard for that element. The atomic number is the number of protons in an atom's nucleus.
Similarly, you may ask, what is an isotope of an element?
Elements are defined by the number of protons in the atomic nucleus. A third form of hydrogen known as tritium has one proton and two neutrons: its mass number is 3. When an element's atoms have different numbers of neutrons they are said to be isotopes of that element.
What is the difference between an atom and an isotope?
An atom is a nucleus with bound electrons, and an isotope is a way to distinguish between different types of nuclei. An atom has a nucleus composed of protons and neutrons. An atom also has one or more electrons that are bound to the nucleus.