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Helium(He) Element
| Basic Infomation | |
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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