Superconductor: without transition tempperature
Elements have no (known) transition tempperature. Examples are hydrogen and other elements of the 1st main group, all noble gases as well as many elements of the lanthanides and actinides.
9F
Fluorinevery pale yellow (gas); bright yellow (liquid); alpha is opaque, beta is transparent (solid)
59Pr
Praseodymiumgrayish white
61Pm
Promethiummetallic
64Gd
Gadoliniumsilvery white
66Dy
Dysprosiumsilbrig weiß
98Cf
Californiumsilvery
99Es
Einsteiniumsilvery; glows blue in the dark