Properties of argon atoms

Ionisation Energies and electron affinity

The electron affinity of argon is 0  kJ mol-1. The ionisation energies of argon are given below.

Ionisation energy number Enthalpy /kJ mol-1
1st 1520.6
2nd 2665.8
3rd 3931
4th 5771
5th 7238
6th 8781
7th 11995
8th 13842
9th 40760
10th 46186
11th 52002
12th 59653
13th 66198
14th 72918
15th 82472
16th 88576
17th 397604
18th 427065

Ionisation energies of Ar

Electronic configuration

The following represents the electronic configuration and its associated term symbol for the ground state neutral gaseous atom. The configuration associated with argon in its compounds is not necessarily the same.

Pointer to The Orbitron gallery of orbitals.

Kossel shell structure of Ar
A schematic representation of the shell structure of argon - not what the atom of argon "looks like".

WebElements Shop

WebElements now has a WebElements shop at which you can buy periodic table posters, mugs, T-shirts, games, fridge magnets, molecular models, and more.

Periodic Table fridge magnets Periodic Table fridge magnets
Buy our periodic table fridge magnets here

WebElements poster Periodic table t-shirts Periodic table mouse mats Molymod molecular model kits Chemistry educational resources

argon atomic number