yes
All the uranium isotopes are radioactive.
All the isotopes of uranium and plutonium are radioactive; plutonium isotopes have a greater specific activity. For cerium: the isotopes 136Ce and 142Ce are possible to be radioactive but having very long half lives and a not significative radioactivity.
Yes, plutonium-239 is a radioactive isotope commonly used in nuclear reactors and weapons. It decays through alpha particle emission, and its radioactivity poses significant health risks if not handled properly.
Plutonium and xenon are radioactive elements. Plutonium is a synthetic element, while xenon occurs naturally but can also be produced synthetically. Barium and cesium are not synthetic elements but can have radioactive isotopes.
Plutonium has no natural isotopes. All plutonium isotopes are artificially produced through nuclear reactions.
A radioactive element with several isotopes that always has 94 protons within its nucleus.
Not all isotopes are radioactive; the radioactive isotopes are unstable and emit radiations.
All radioactive isotopes will disintegrate.
All isotopes of francium are radioactive.
Plutonium is especially an alpha particles emitter.
The Chernobyl fallout primarily consisted of radioactive isotopes like iodine-131, cesium-137, and strontium-90, rather than plutonium. Plutonium was not a significant component of the released radiation.
Not all of the transition elements are radioactive. Many of them are, and some of them have common radioactive isotopes, but some of them have no naturally occurring radioactive isotopes. Please note that all elements have synthetic radioactive isotopes, at least.