The chemistry of polonium is not known in details but I suppose that this element is oxygen.
Oxygen, hydrogen, halogens
Very probable this element is oxygen.
Very probable this element is oxygen.
Oxygen, hydrogen, halogens
Polonium doesn't contain another element.
Polonium doesn't contain another element.
this is a guess but beryllium?
no, it is most commonly found as a compound
Sodium
hydrogen is most commonly found as a part of water with oxygen.
Natural polonium exist in uranium and thorium ores.
You think probable to radium.