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It's a semantic thing - by definition, if something gives out radiation, then it is radioactive. If an element gives off radiation, then it is a 'radioactive' element. If it does not give out radiation, then it is not 'radioactive'.
Yes. Cesium is a live radiation souce that is used to treat a localized area. Chemo is a systemic therapy that courses through the entire body (it is not radioactive).
If you are receiving radiation treatment for cancer, you can still be around kids. The radiation, and the cancer, are not contagious.Another Answer:It depends on whether you just receive radiation, or if you have radioactive implants. If you just receive radiation therapy, such as gamma radiation from Cobalt-60, then you are not radioactive when you leave the facility. If you have implants, however, such as around the prostate gland in certain forms of therapy, you are radioactive, and you need to ask your radiation technologist and doctor what your limits are relative to being around children.Note: Some radiation treatment, particularly neutron bombardment, can cause activation of some of your atoms into a radioactive form. To be safe, talk to your doctor, etc. in any case.Also, bone scans, heart scans, and other types of scans where you are injected with a radioactive tracer, such as Technicium-99M, do make you radioactive for a short while, often just a few days. Again, talk to your doctor.
Patients receiving internal radiation therapy do become temporarily radioactive
Patients receiving intracavitary radiation do become temporarily radioactive
Patients receiving interstitial radiation do become temporarily radioactive
If you mean radioactive as in atomic or nuclear, not necessarily. Light is radiation, regardless of its color, but not usually radioactive in and of itself. Atomic or nuclear radiation has no color.However, by the strictest definition, anything that emits radiation of any kind, such as a blue light bulb emitting blue light (which is radiation), could be considered radioactive.
radioactive elements
All elements with an atomic number >83 are naturally radioactive
Radioactive substances are the things that put off radiation. These could be radioactive waste, or even radioactive materials not yet used.
No. Radiation is always present in the environment and in most cases is harmless. In some regions there is a problem with natural radon, a radioactive gas, working its way into homes, but this is an issue that must be addressed one building at a time. Large-scale disasters involving radioactive materials are the result of humans who have taken such materials from the environment and concentrated them into forms we can use.
When sick people are treated with radiation, that does not make them radioactive. Radiation is dangerous, but radiation patients are not.