Polonium has the half-Life of ______.

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Polonium has the half-Life of 13.8 days. Explanation: At normal temperatures, oxygen is a gas, whereas the other elements are solids. Nonmetals include oxygen and sulphur, metalloids like selenium and tellurium, and metals like polonium. Polonium has a half-life of 13.8 days and is radioactive. With increasing atomic numbers, melting and boiling points rise. All of the elements in Group 16 are allotropy.

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