Radium (Ra) atomic number 88
It is supposed that ununseptium is a halogen (non metal).
A radioactive element that undergoes nuclear decay to transform into a different element is called a parent isotope. The decay process involves the emission of particles and/or energy until the parent isotope reaches a stable form, known as the daughter isotope. This decay process is used in radiometric dating to determine the age of rocks and minerals.
That element is Berkelium, symbol "Bk" and atomic number 97, a radioactive element in the heavy "actonoid" series. Berkelium is named after the Californian university town of Berkeley where it was first synthesized. Scientists at the University of California's Ernest Orlando Lawrence Berkeley National Laboratory (simply known as "Berkeley Lab") first synthesized Berkelium in 1949. They created it by bombarding a small piece of Americium ("Am" atomic number 95) with alpha particles within a cyclotron.
Plutonium is a synthetic element that is radioactive. It does not occur naturally in nature and must be artificially produced through the nuclear fission of uranium.
Francium is a radioactive chemical element an can disintegrate.
Probably uranium is the best known radioactive element.
Marie Curie. Uranium was discovered in 1789 by the German chemist Martin Heinrich Klaproth working in Berlin.
The shortest half-life of any known radioactive element is that of francium-223, which is approximately 22 minutes.
Bismuth
Of elements that have no stable isotopes, technetium has the lowest atomic number, which is 43.
non radioactive element
Element Am is Americium. Americium is radioactive element number ninety five. I would not wanna mess with Americium
Radioactivity is discovered on uranium.
Element 110 on the periodic table is darmstadtium (Ds). It is a synthetic element that was first synthesized in 1994 by a German research team. Darmstadtium is a highly radioactive element with no known stable isotopes.
One well-known heavy element is uranium. It is commonly used as a fuel in nuclear reactors and is known for its radioactive properties.
Your question is meaningless. Radium IS a radioactive element, and its power depends on the context. If you mean "is there an element more radioactive than radium" then yes, there are many, e.g. astatine.
The element with atomic number 105 is Dubnium (Db). It is a synthetic element that was first synthesized in 1968 by a team of Russian scientists. Dubnium is highly radioactive and has no known biological role.