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Polonium is the element in chemistry that atomic number is 84

here some other properties of Polonium are listed below.

Name: Polonium

Symbol: Po

Atomic Number: 84

Atomic Mass: (209.0) amu

Melting Point: 254.0 °C (527.15 K, 489.2 °F)

Boiling Point: 962.0 °C (1235.15 K, 1763.6 °F)

Number of Protons/Electrons: 84

Number of Neutrons: 125

Classification: Metalloid

Density @ 293 K: 9.4 g/cm3

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