Actually you are radioactive. Some of the Potassium in your body is decaying by radioactivity to Argon. This is a small amount however, smaller than the radiation you'd receive from an ionization smoke detector in your house. If you take a plane flight, at higher altitudes you are exposed to charged particles from space, from which the earth's atmosphere usually shields us. So international flights are (slightly) more hazardous, for they spend more time, and at higher altitudes than do domestic ones. This amount of radiation can usually be ignored though, even by flight crew, who spend much more time at altitude than does a passenger.
Focusing closely on the question, a serious radiation dose will cause your hair to fall out, and maybe your gums to bleed. Serious enough, of course, would be fatal. Some of this is because the radiation actually changes the chemical nature of the atoms. (As above with the potassium.) Some of the daughter elements, as they are called, are at least useless, and at worst, toxic.
It would become an atom of a different element. This can only happen during radioactive decay, nuclear fusion, or nuclear fission.
Tumor grows
Although all people do contain a small amount of radioactive isotopes in their bodes, making them slightly radioactive, it is not nearly a large enough dose to have any noticeable effects. But if you mean a person who is highly radioactive, then the most likely way for that to happen is if a radioactive substance were to enter that person's body. The effects of that would depend on the dose and the substance. For instance, plutonium, which emits alpha, beta and gamma rays causes radiation sickness and an increased chance of cancer. And radium which emits more alpha rays then beta or gamma rays and is much more radioactive then plutonium causing much the same effects and decays into radium. As radium is chemically similar to calcium, it can cause great harm by replacing calcium in the persons bones.
The deformation would increase because the force increases.
That would expose the DNA to possible damage.
We would not be eating fish
Widespread radioactive contamination
It would become a different element. It could become radioactive.
That is not how nuclear bombs are made.
bullfighters would be out of a job
then you would not even be here
Then there would be no human nature.
No isotope of copper ordinarily found in nature is radioactive. Like all elements, synthetic radioactive isotopes of copper exist.
If the sun became larger, the climate would get hotter.
It would become an atom of a different element. This can only happen during radioactive decay, nuclear fusion, or nuclear fission.
If I were queen, I would rule the place I live in...
there would only be plants