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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.

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