It is a gas.
A GAS!!!! The atmosphere is 20% oxygen , and of course the atmosphere is a gas. Oxygen condenses to a liquid at 90.188 K (-182.962 oC) On further cooling it solidifies at 54.36 K (-218.79 oC).
Iodine is a solid at 20 degrees Celsius.
It is a gas.
Barium is a solid at 20 degrees Celsius.
Gaseous state. The boiling point of radon is -71 degrees C. So at 20 degrees C, it is above the boiling point and is a gas at this temperature.
Plutonium is a solid at 20 degrees Celsius. It has a melting point of 639.4 degrees Celsius and a boiling point of 3228 degrees Celsius, so at 20 degrees it would be in a solid state.
8
Thorium is solid at 20 degrees as it has a melting point of 2023 K ​(1750 °C) and a boiling point of 5061 K ​(4788 °C).
potassium has melted by time it reaches 20 degrees.
Niobium is a solid metal at 20 C.
Sulfur undergoes a phase change from solid to liquid as the temperature increases from 20°C to 100°C. This is because sulfur has a melting point of around 115°C, so it transitions from a solid state at 20°C to a liquid state at 100°C.
(-20) degrees Celsius = -4 degrees Fahrenheit [°F] = [°C] × 1.8 + 32