Polonium with the atomic number 84 is in the group 16 and period 6 of the Periodic Table of Mendeleev.
Some compounds of polonium are: PoO, PoO2, PoO3, PoH2, halides as PoX2, PoX4, PoX6 and the strange class of polonides (compounds of polonium with other metals). The Pauling electronegativity is 2. Possible valences are: 2, 4, 5, 6, -2.
Polonium is considered generally as a metal but some chemists consider Po as a metalloid.
Some compounds of polonium are: PoO, PoO2, PoO3, PoH2, halides as PoX2, PoX4, PoX6 and the strange class of polonides (compounds of polonium with other metals).
oxygen, hydrogen, halogens
Oxides, halogenides, hydride, etc.
Natural polonium exist in uranium and thorium ores.
Polonium is a radioactive element. It is produced when naturally occurring uranuium-238 decays and is distributed into the crust of the Earth in small amounts. It has been found in tobacco and in uranium ores.
O3 is a molecule / compound, not element
No because it is not an element. It is a mixture of 3 aromatic isomers found in crude oil.
Einsteinium is an artificial element; it is prepared as a compound, probably as an oxide or as a compound with halogens.
Oxygen, hydrogen, halogens
Very probable this element is oxygen.
The chemistry of polonium is not known in details but I suppose that 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.