A radioactive element is an element that emits radiation due to instability. They are commercially used in the generation of electricity in nuclear power plants and home smoke detectors among other things.
Radioactive elements make up a small fraction of all naturally occurring elements in Earth's crust. Most elements are stable and non-radioactive. However, even though they are a minority, radioactive elements play important roles in various scientific, medical, and industrial applications.
Isolation of the radioactive elements Polonium and Radium.
No, trace elements are not necessarily radioactive. A link to a list of elements that have no natural radioactive isotopes is at a related question, below.
After disintegration all radioactive elements are transformed in other elements.
Any of a variety of elements might do for this, including thorium and uranium, but even potassium has an important radioactive isotope in it.
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.
Radioactive elements
Radioactive elements exist in all groups of the periodic table.
Elements with no stable isotopes are called radioactive elements. These elements spontaneously undergo radioactive decay, which leads to the formation of stable isotopes over time.
Radioactive elements exist in all groups of the periodic table.
Yes, but only if it is radioactive. Radioactive elements change into different elements through radioactive decay.
Some synthetic elements are naturally radioactive due to their unstable atomic structures. For example, elements beyond uranium on the periodic table are typically artificially produced and tend to be radioactive. These elements can emit radiation as they undergo radioactive decay.