Latin name | Argon |
English name | Argon |
chemical symbol | Ar |
atomic number | 18 |
relative atomic mass | 39,948 |
period | 3 |
group | VIII.A |
classification | noble gases |
discovery year | 1894 |
discoverer | W. Ramsay, R. J. Rayleigh |
melting point [°C] | -189,2 |
boiling point [°C] | -185,7 |
critical temperature [°C] | -86,28 |
critical pressure [MPa] | 4,988 |
density [g cm-3] | 0,0017824 |
electronegativity [Pauling] | 3,9 |
oxidation states | 0 |
electron configuration | [Ne]3s2 3p6 |
atomic radius [pm] | 71 |
covalent radius [pm] | 97 |
specific heat [J g-1K-1] | 0,52 |
heat of fusion [kJ mol-1] | 1,188 |
thermal conductivity [W m-1 K-1] | 0,01772 |
1. ionizing potential [eV] | 15,7596 |
2. ionizing potential [eV] | 27,629 |
3. ionizing potential [eV] | 40,74 |
state at normal conditions | gas |