Yes
Yes, radioactive isotopes are largely used for the treatment of cancer.
Yes
Radioactive isotopes can be used in radiation therapy to target and destroy cancer cells. The isotopes are directed at the tumor site, where their radiation damages the cancer cells and inhibits their growth. This helps to shrink or eliminate the tumor and treat the medical problem.
Carbon-14 is used to determine the age of fossils. Radiation therapy for cancer comes from isotopes that emit gamma rays. Thyroid tissue that may be cancerous and has left the throat region can be located in the body with radioactive iodine.
Radioactivity is indeed used to treat some types of cancer. Electron beams are used for surface cancers due to their lower energy. Proton beams and neutron beams are used to treat other hard to reach cancers. Carbon ion radiation is also sometimes used.
Both isotopes and radioactive isotopes are pretty much the same but radioactive isotopes are better because it can be used to make medicine.
If a human is exposed to radiation the may get radiation sickness, and cancer (although it can be used to treat cancer)
Some examples are deuterium and tritium which are radioactive isotopes of hydrogen.
There are no radioactive isotopes of boron that are ordinarily found in nature. All elements have synthetic radioactive isotopes, however.
Radioactive isotopes can be used in diagnostic imaging, such as with PET scans which use radioactive tracers to detect diseases like cancer. Radiotherapy involves the use of radiation to treat cancer by targeting and destroying cancer cells in a targeted manner.
Radioactive isotopes are made in reactors, and can be used both for diagnosis and treatment, especially of cancer.
It depends what you want to use it for. They are extremely dangerous and can kill you if exposed to the wrong kind, but they are also how much of the world's electricity is produced. Radioactive isotopes are also commonly used in medicine for a number of beneficial purposes. Radioactive isotopes are also what nuclear bombs use. Like most things in the world, they can be used for great good, and terrible harm... it just depends on what you do with it.