anything past bismuth and 2 elements in middle (promethium and another I don't remember). some researchers believe bismuth is also naturally radioactive, but with a half-life longer than the age of the universe.
Most of them do. Radon probably does not.
1. astatine is a halogen that is radioactive.
For most practical purposes, lutetium can be regarded as stable, though it is slightly radioactive. 97.41% of lutetium found in nature is stable, and 2.59% is of an isotope with a half life of 37,800,000,000 years. Like all other elements, lutetium has synthetic radioactive isotopes.
Group 3 of the periodic table contains many of the radioactive elements.
All of the actinides are radioactive, and almost all are synthetic.
None of the isotopes of xenon ordinarily found in nature is radioactive. Like all elements, xenon has synthetic radioactive isotopes.
Most of the natural occurring (isotopes of) elements are NOT radioactive.Though most of all the known isotopes are radioactive but most of them do NOT naturally occur.
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.
Most of them do. Radon probably does not.
1. astatine is a halogen that is radioactive.
For most practical purposes, lutetium can be regarded as stable, though it is slightly radioactive. 97.41% of lutetium found in nature is stable, and 2.59% is of an isotope with a half life of 37,800,000,000 years. Like all other elements, lutetium has synthetic radioactive isotopes.
Group 3 of the periodic table contains many of the radioactive elements.
All of the actinides are radioactive, and almost all are synthetic.
Uranium is one of the most common radioactive elements used in nuclear reactions. It undergoes nuclear fission, where its nucleus is split into smaller fragments, releasing energy in the process.
The first 82 elements in the periodic table are all naturally occurring elements. They range from hydrogen to lead and have unique chemical properties based on their atomic structure and electron configurations. These elements form the building blocks of all matter in the universe.
Holmium actually has the highest magnetic strength out of all known elements given it is first submersed in an artificially produced magnetic field.
Hydrogen and helium, the most common elements in the Universe.Hydrogen and helium, the most common elements in the Universe.Hydrogen and helium, the most common elements in the Universe.Hydrogen and helium, the most common elements in the Universe.