The Periodic Table/2 - Helium (He)

Element Helium (He, 2)

Here you can read more about the chemical element Helium. Its shemical symbol is He and its atomic number is 2. The relative atomic mass of Helium is 4.002602 u. The elemental classification of Helium is Noble gases, and it belongs to group 18 and period 1 in the Periodic Table of Elements.

The density of Helium is 0.1785 kg/m3. The melting point of Helium is 0.95 Kelvin (-272.05 ℃). The boiling point of Helium is 4.22 Kelvin (-268.78 ℃). The electron configuration of Helium is 1s2. Helium was discovered in the year 1868 by Pierre Janssen and Norman Lockyer.

To the right (or below if you are using a mobile device with a smaller screen) you will find the information given above for the element Helium ordered in tabular form, which might be easier to read and use if you want to quantify it in some sort.

Data about element Helium

Chemical symbol
Element classification
Noble gases
Atomic number
Relativ atomic mass
Atomic mass
4.002602 u
0.1785 kg/m3
Melting point
0.95 K   (-272.05 ℃)
Boiling point
4.22 K   (-268.78 ℃)
Electron configuration:
Discovered year
Discovered by
Pierre Janssen och Norman Lockyer