Radioactivity

Radioactivity is a kind of energy that certain materials can give off. Some materials, like uranium and radon, are naturally radioactive. Radioactivity is invisible and can't be seen or felt, so we can't tell it's there just by looking at something. But we can measure it using special tools and machines. When something is radioactive, it will give off energy in the form of particles and rays. These particles and rays can be very dangerous and cause harm to people if we don't take the necessary precautions, like using radiation suits and shields.