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Although most of the known elements have at least one isotope whose atomic nucleus is stable indefinitely, all elements have isotopes that are unstable and disintegrate, or decay, at measurable rates by emitting radiation.
Some elements have no stable isotopes, which means that any atom of that element is radioactive. For some other elements, only certain isotopes are radioactive. A radioisotope is an isotope of an element that is unstable and undergoes radioactive decay.
Why do different isotopes of an element generally have the same physical and chemical properties? How would the nucleus of the hydrogen-1 and hydrogen-2 differ? Relate the concepts of isotope and mass number.
12 Σεπ 2023 · The alpha, beta, and gamma rays are generally emitted by unstable isotopes. It is an unstable combination of protons and neutrons in an unstable isotope or radioactive isotope. Unstable isotopes are classified into long-lived, cosmogenic, anthropogenic, and radiogenic categories based on their creation process.
An unstable isotope is a variant of a chemical element that has an unstable nucleus, causing it to undergo radioactive decay over time. This decay process can transform the unstable isotope into a more stable isotope or a completely different element, releasing energy and radiation in the process.
2 Ιαν 2013 · Unstable isotopes: definition and examples. Unstable isotopes, also known as radioisotopes, are those isotopes that undergo radioactive decay, emitting subatomic particles or radiation in an attempt to reach a more stable configuration.
Unstable isotopes most commonly emit alpha particles (He 2+) and electrons. Neutrons, protons, and positrons can also be emitted and electrons can be captured to attain a more stable atomic configuration (lower level of potential energy ) through a process called radioactive decay.
