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Name: Helium

Symbol: He

Atomic Number: 2

Atomic Mass: 4.002602 amu

Melting Point: -272.0 °C (1.15 K, -457.6 °F)

Boiling Point: -268.6 °C (4.549994 K, -451.48 °F)

Number of Protons/Electrons: 2

Number of Neutrons: 2

Classification: Noble Gas

Crystal Structure: Hexagonal

Density @ 293 K: 0.1785 g/cm3

Color: colorless

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13y ago

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