Polonium is a natural chemical element but can be also obtained artificially.
Polonium is a chemical element. So the only thing it is made of are polonium atoms.
Natural polonium exist probable as a compound (as PoPb) but this hypothesis was not surely confirmed up today.
No, polonium is not found in pennies. Pennies are made primarily of copper and zinc, with a small amount of nickel. Polonium is a highly radioactive element not used in coin production.
Neodymium is a natural element and a rare-earth metal that can be found in the Earth's crust. It is not man-made.
Polonium is a natural radioactive element.
No. Polonium is a natural product of radioactive dacay.
Polonium is a solid.
Radium and polonium are radioactive natural chemical elements.
Polonium is a solid, man-made, radioactive poor metal.
Natural polonium exist in uranium and thorium ores.
It is natural but there are man-made imitations.
It can be made from natural or man made fibres.
Is limestone natural or man made
natural feature
Man-made and Natural Resources
Polonium and especially radon contribute to the natural environmental radioactivity.
Polonium and radium are natural chemical elements, metals, solid, very radioactive.