One way to tell if an element is radioactive is by checking its atomic number. Elements with atomic numbers above 83 are generally considered radioactive. You can also consult a periodic table that includes information on which elements are radioactive.
The most common signs of radioactive elements are their emission of radiation and their unstable atomic nuclei. Some radioactive elements may also have a shorter half-life, meaning they decay faster compared to non-radioactive elements.
No, you cannot detect radioactivity with your senses. Radioactivity is invisible and odorless, so it cannot be seen, heard, smelled, tasted, or felt. Special equipment, such as a Geiger counter, is needed to detect radioactivity.
The best way to protect yourself from radioactive elements is to limit your exposure to them. This can be done by staying away from sources of radiation, wearing protective gear, and following safety protocols when handling radioactive materials. It is also important to properly dispose of any radioactive waste.
No, not all elements can become radioactive. Only elements with unstable atomic nuclei have the potential to become radioactive. These elements are typically found in the middle and higher atomic number regions of the periodic table.