the gamma and beta radiations which can cause cell mutation and radiation poisoning
Good. It is interesting Bad: Risk for exposure to radioactive materials
Radioactive substances are the things that put off radiation. These could be radioactive waste, or even radioactive materials not yet used.
Radioactive fallout
Plutonium is very important for nuclear weapons and for nuclear fuels used in nuclear reactors. But plutonium is also toxic and radioactive. See the link below.
No. All things are radioactive, including living things and even humans. All matter (save a few) emits gamma radiation spontaneously.
too much is very bad...it's used for cancer, which is safe, though.
Polonium is extremely radioactive.
It's not necessarily bad, just very radioactive and easily used to make bombs.
Yes some things that are radioactive are toxic. Being able to harm an exposed organism.
When you do bad things, bad things will happen to you (you will get bad Karma)
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.
Uranium is toxic, radioactive, can be used for weapons.