The lightest "element" that can undergo radioactive decay is the isotope hydrogen-3, which undergoes beta decay. The lightest element with no radioactively stable isotopes is technetium, and its isotopes have different modes of decay.
When a radioactive element slowly turns into another element/s when it emits various particles.
It means that massive nuclei break apart.
Matter can be made to undergo nuclear decay in reactors, but it is a process that occurs spontaneously in nature.
Radio active material that occurs naturally where human activities exposure to ionizing radiation are naturally-occurring radioactive materials, or NORM. They include uranium and thorium. Radioactive materials are mainly used in engineering and science departments. This type of material emits gamma rays or particles that as radioactive energy.
Radioactive waste bags would usually be either yellow or bright orange, with the radioactivity trefoil printed on it along with warnings. It should be noted, that though Radioactive waste SHOULD be stored in Yellow bags, and tagged as "Radioactive Waste", Not all yellow bags contain radioactive waste, And, yellow bags that one finds loose, without a tag, MAY BE Radioactive Waste, and treated as a "SPILL", or "Loss of control of Radioactive Material". At that point, proper personnel should be notified, and the person finding the bag, should stand fast, allowing NO ONE to go anywhere NEAR the bag, until it has been disposed of by trained and certified personnel, and the area around and leading to the bag, declared "Clean". Naturally, this type of action and problem usually only occurs in and around places that handle Radioactive Material/Waste. But, a Hospital, DOES quite often handle both low level, and HIGH level Radioactive Materiel, and therefore, Yellow bags, should be assumed Radioactive, properly tagged or not.
When a radioactive element slowly turns into another element/s when it emits various particles.
Some isotypes are more stable than others. Decay occurs because of instability in isotopes, so stable isotopes do not undergo radioactive decay.
Radium and polonium
It means that massive nuclei break apart.
Nuclei undergo radioactive decay in order to release some of the "stress" in the atom. At a certain point, the nucleus of an atom gets too large to sustain all of those protons and neutrons. When the "stress" is relieved, a phenomenon called radioactive decay occurs.
Hydrogen is the simplest, lightest element. It normally occurs as "protium", the atom having one proton and one electron.
It occurs due to the instability of the element. It is a spontaneous process. Radioactive atoms are known as isotopes.
All the decay chain isotopes are radioactive and toxic (excepting the last member which is non-radioactive but also toxic); you think probably to radium or polonium.
Transmutation of elements refers to the conversion of one chemical element into another. This occurs in nuclear reactions or through radioactive decay.
Radon is a radioactive chemical element that is created through the natural radioactive decay of uranium. Since uranium occurs naturally throughout our planet, we also find radon naturally.
Radioactive Decay occurs naturally all around us. If you test for radiation with a Geiger Counter, you will find that it picks up radiation in the air around you. Mostly, however, radioactive decay occurs in the earth's crust. I cannot name a specific element, as there are many that decay.
transmutation, neutrons