Critical point

The critical point describes the extreme value of a phase boundary line (binodal), at which a substance undergoes a minimum or maximum of pressure and temperature. At this point, existing phases are fluids (individual particles can move freely in space).

ElementCritical point
1HHydrogen32.93 K @ 1.285 MPa
2HeHelium5.195 K @ 0.2274 MPa
3LiLithium(3,220 K @ 67 MPa)
4BeBeryllium(5,205 K)
7NNitrogen126.2 K @ 3.39 MPa
8OOxygen154.5 K @ 5.043 MPa
9FFluorine144.4 K @ 5.172 MPa
10NeNeon44.49 K @ 2.768 MPa
11NaSodium(2,573 K @ 35 MPa)
16SSulfur1,314 K @ 20.7 MPa
17ClChlorine416.9 K @ 7.991 MPa
18ArArgon150.6 K @ 4.863 MPa
19KPotassium2,223 K @ 16 MPa
33AsArsenic(1,673 K)
34SeSelenium1,766 K @ 27.2 MPa
35BrBromine588 K @ 10.34 MPa
36KrKrypton209.4 K @ 5.525 MPa
37RbRubidium(2,093 K @ 16 MPa)
53IIodine819 K @ 11.7 MPa
54XeXenon289.7 K @ 5.842 MPa
55CsCaesium1,938 K @ 9.4 MPa
80HgMercury1,750 K @ 172 MPa
86RnRadon377 K @ 6.28 MPa