it gives off toxing in the body
Nitrogen
albino acid
sulfur
This is a radioactive chemical element.
It means the element is unstable and gives off dangerous particles.
Oil and gas,
Radium is an example
Radioactive
Neon
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'.
Uranium is a natural, radioactive chemical element.
Iodine on heating gives off dense purple vapor.
It is still active and has internal heat
An element can show an excited state when it casts off extra energy. This process can occur when a collision occurs between an atom and a particle or if it absorbs a proton.