The Periodic Table/18 - Argon (Ar)

Element Argon (Ar, 18)

Here you can read more about the chemical element Argon. Its shemical symbol is Ar and its atomic number is 18. The relative atomic mass of Argon is 39.948 u. The elemental classification of Argon is Noble gases, and it belongs to group 18 and period 3 in the Periodic Table of Elements.

The density of Argon is 1.784 kg/m3. The melting point of Argon is 84 Kelvin (-189 ℃). The boiling point of Argon is 87.3 Kelvin (-185.7 ℃). Argon was discovered in the year 1894 by Lord Rayleigh and William Ramsay.

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 Argon ordered in tabular form, which might be easier to read and use if you want to quantify it in some sort.

Data about element Argon

Chemical symbol
Element classification
Noble gases
Atomic number
Relativ atomic mass
Atomic mass
39.948 u
1.784 kg/m3
Melting point
84 K   (-189 ℃)
Boiling point
87.3 K   (-185.7 ℃)
Discovered year
Discovered by
Lord Rayleigh and William Ramsay