Gas
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The physical state of Mercury is a LIQUID at 20oC . It is one of only two elements that are liquid at Standard Temperature and Pressure. The other being Bromine.
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).
Oxygen is a gas at 20 degrees Celsius. It has a boiling point of -183 degrees Celsius and a melting point of -218 degrees Celsius, so at room temperature, oxygen exists as a gas.
There are thousands of substances which are gas at 20 deg C.
it is a state at 20 degrees if you don't know go to an other website
At 20 degrees celsius, Yttrium is solid. It's melting point is far above 1000 degrees.
Selenium is a solid at 20 degrees Celsius!
Hydrogen is in a gaseous state at 20 degrees Celsius.
At Room temperature, its a solid
The state of argon at 20 degrees is a gas.