Name: Helium
Symbol: He
Atomic Number: 2
Atomic Mass: 4.002602 amu
Melting Point: -272.0 ¡ãC (1.15 ¡ãK, -457.6 ¡ãF)
Boiling Point: -268.6 ¡ãC (4.549994 ¡ãK, -451.48 ¡ãF) |
Number of Protons/Electrons: 2
Number of Neutrons: 2
Classification: Noble
Gas
Crystal Structure: Hexagonal
Density @ 293 K: 0.1785 g/cm3
Color: colorless |
