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Promethium(Pm) Element

Basic Infomation

Name: Promethium

Symbol: Pm

Atomic Number: 61

Atomic Mass: (145.0) amu

Melting Point: Unknown

Boiling Point: Unknown

Number of Protons/Electrons: 61

Number of Neutrons: 84

Classification: Rare Earth

Crystal Structure: Hexagonal

Density @ 293 K: 6.475 g/cm3

Color: Unknown


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