What do we mean by a radioactive metal?

Asked by divyakhare | 11th Aug, 2010, 12:00: AM

Expert Answer:

radioactive metals are luminous metallic elements, which are capable of spontaneous disintegration of atomic nuclei resulting in emision of radiation which can  penetrate matter impervious to ordinary light
Examples Actinium, radium, or uranium,
Because a nucleus is made of similiarly charged protons, there has to be a nuclear strong force to overcome the repulsions. Neutrons also help by keeping the protons farther apart from each other.
But when there are too many protons, the proton-proton repulsions build and the nucleus becomes unstable. To achieve stability, they undergo radioactive decay, ejecting small nuclear fragments and high-energy radiation.

Answered by  | 11th Aug, 2010, 11:57: AM

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