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Plutonium ✕
Symbol Pu
Atomic number 94
Chemical property Actinide
Origin o the name Pluto, a dwarf planet in the Solar System (then considered the ninth planet)
Period 7
Density (g/cm³) 19.84
Melting point (K) 912.5
Boiling point (K) 3501
Electro-negativity 1.28
Abundance in earth's crust (mg/kg) 0