Helium

Helium or He

• atomic number is 2

• atomic weight is 4.002602

• color is Colorless

• state at 298.15°k is Gas

• classification is Nonmetelic

• date of discovery is 1895

• density kg/m^3 is 0.1787

• melting point is 1.09999999999997

• boiling point is 27.07 K

• group is Noble Gas

• Number of neutron is 2