A solid
The state of matter would be solid, because 25 degrees Celsius is "room Temp."
Hydrogen is a gas at 25 degrees Celsius.
Nitrogen would be a gas at 25 degrees Celsius.
The state of matter of mercury and the motion of its particles as it is heated from 45 degrees Celsius to 356 degrees Celsius is 46 million.
A gas.
gas
solid
a gas
At 50 degrees Celsius, water is liquid. It boils and becomes gas at 100 degrees Celsius, and freezes and becomes solid at 0 degrees Celsius.
A solid I believe.
At 500 deg Celsius, it is a vapour.
The same as what is between your ears!