Because 20C is *way* below its melting point, which is obvious - maybe you need a more detailed answer.
Solid still room temperature i think
Boron is a solid at 20 0C.
It's a solid.
solid
No, it is a gas!
Solid
Solid still room temperature i think
Sulphur is solid at 20 Celsius.
Gold is a solid at 20 degrees Celsius.
Solid
Water is a solid at -20 degrees Celsius
Copper(I) oxide has a melting point of 1201 degrees Celsius, and a boiling point of 2000 degrees Celsius. Copper(II) oxide has a melting point of 1235 degrees Celsius, and a boiling point of 2000 degrees Celsius.
Boron is a solid at 20 0C.
Scandium is a solid at 20 degrees Celsius.
It's a solid.
Solid
solid