Because 20C is *way* below its melting point, which is obvious - maybe you need a more detailed answer.
At 20 degrees Celsius, copper is in a solid state. Copper melts at 1,085 degrees Celsius, so at 20 degrees Celsius, it remains solid.
At 800 degrees Celsius, copper is in solid state. Copper has a melting point of 1085 degrees Celsius, so at 800 degrees Celsius, it remains in its solid form.
At 25 degrees Celsius, copper is in its solid state. Copper has a melting point of 1,984 degrees Fahrenheit (1,083 degrees Celsius), so at room temperature, it remains solid.
Boron is a solid at 20 0C.
It's a solid.
At 20 degrees Celsius, copper is in its solid state. Copper has a melting point of 1,085 degrees Celsius, so at 20 degrees Celsius, it remains a solid metal.
At 20 degrees Celsius, copper is in a solid state. Copper melts at 1,085 degrees Celsius, so at 20 degrees Celsius, it remains solid.
Solid
At 800 degrees Celsius, copper is in solid state. Copper has a melting point of 1085 degrees Celsius, so at 800 degrees Celsius, it remains in its solid form.
At 25 degrees Celsius, copper is in its solid state. Copper has a melting point of 1,984 degrees Fahrenheit (1,083 degrees Celsius), so at room temperature, it remains solid.
Boron is a solid at 20 0C.
It's a solid.
Phosphorus is typically a solid at 20 degrees Celsius.
Sulphur is solid at 20 Celsius.
Gold is a solid state at 20 degrees Celsius. Gold has a melting point of 1,064 degrees Celsius and a boiling point of 2,807 degrees Celsius, so at 20 degrees Celsius it would be in its solid phase.
Copper is a solid at room temperature of 25 degrees Celsius.
Sodium is a solid at 20 degrees Celsius. It melts at 97.8 degrees Celsius and boils at 882.9 degrees Celsius.