which one is not a radioactive element?

which one is not a radioactive element?

Explanation
  • polonium  is not a radioactive element
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  • It is found in the form of an elemental state having allotropes with colors black, red and grey.
  • Thus it is also a non-radioactive element.
  • Polonium is a group of 16 elements with atomic number 84 and an atomic mass of 204.
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  • The common 4 radioactive elements are Uranium, Radium, Polonium, Thorium, etc.