Is there such thing as anything radioactive that's geeen?

Question

is there such thing as a green element or stone being radioactive?

lol just curious

Answer 1

yes Radon

Answer 2

Perhaps you are thinking of 'glow in the dark' materials. Nowadays, these are not radioactive, and the green glow on watch dials is due to a phosphorescent effect. The dial is painted with a phosphorescent material that absorbs energy when exposed to daylight or artificial light, then re-emits it as a green glow when it is dark.
As you might have noticed, the glow graduallly becomes fainter as the substance loses energy; eventually becoming too faint to see.

During the war; in aeroplanes, on compasses and such, they needed such dials that glowed continuously. To do this, they added salts of radium to the paint; and the radioactive decay of the radium provided enough energy for the dial to glow continuously.

Each dial emitted only a faint amount of radiation, which was not harmful. However, back in the factories where they painted the dials, the painters (mostly women) were exposed to high levels of radiation, without knowing it. Many of them developed radiation sickness, and effects of exposure to radiation years later (cancer, for example)

The practice was aboandonned when knowledge about the health risks of exposure to radiation became known. However, there were still all the radioactive dials out there. I know of one case, where a large number of old instrument and compass dials were dumped down an old well at a disused munitions factory, and together they were a radiation hazard; requiring the services of an expert decontamination team.

Also, Radon gas is radioactive, and naturally gives off a greenish glow.