Helium (He) Element
| Basic Information | |
| 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 |
