Gas
Yes, at 1000 degrees Celsius, mercury will be in a gaseous state. Mercury has a boiling point of 356.9 degrees Celsius, so it will have transitioned to a gas at 1000 degrees Celsius.
At room temperature, mercury (Hg) is a liquid, and methane (CH4) is a gas. The melting point of methane is -182.5 degrees Celsius. The melting point of mercury is -39 degrees Celsius. It takes more heat to melt the mercury.
At 1000 degrees Celsius, oxygen exists in a gaseous state. This high temperature well exceeds oxygen's boiling point of -183 degrees Celsius, causing it to be present as a gas.
It depends on what temperature scale you are using. For Celsius (ºC), Sodium is has already melted and will be in liquid form. For Fahrenheit (ºF), Sodium has not yet melted and is in solid form.
Metals that have high melting points above 1000 degrees Celsius, such as iron, copper, and titanium, will generally be solids at 1000 degrees Celsius. Other metals with lower melting points, like lead or mercury, would be liquids or gases at this temperature.
At 1000 degrees Celsius, methane would be in a gaseous state. Methane is a flammable gas that becomes a superheated gas at high temperatures like 1000 degrees Celsius.
Gaseous state
Methane is in a gaseous state at 100 degrees Celsius.
At 25 degrees Celsius, methane is a gas. Methane has a boiling point of -161.5 degrees Celsius, so at room temperature, it remains in its gaseous state.
Methane is a gas at -50 degrees Celsius. It has a boiling point of -161.5 degrees Celsius, so at -50 degrees Celsius, it would be in its gaseous state.
At -50 degrees Celsius, methane remains a gas. Methane has a boiling point of -161.5 degrees Celsius, so at -50 degrees Celsius, it would still be well above its boiling point and would not have undergone a phase change to a liquid.
1000 degrees Fahrenheit is equal to approximately 537.78 degrees Celsius.
At W degrees Celsius, methane will be in a gaseous state. Methane has a boiling point of -161.5 degrees Celsius, so at temperatures above this, it exists as a gas.
At 25 degrees Celsius, methane exists in a gaseous state, as it has a boiling point of -161.5 degrees Celsius. It is a colorless and odorless gas that is lighter than air.
At -50 degrees Celsius, methane is in a solid state.
At 1000 degrees, methane would be in a gaseous state. Methane typically exists as a gas at room temperature and pressure, so at 1000 degrees it would remain a gas.
537.78 degrees Celsius