Solid at room temperature. Melting Point is 2334 Degrees Celsius!!
Ruthenium is a gas
The answer of this question is similar to the questions why solids are solid and gases are gas? The answer is that in solids the intermolecular forces between the atoms of solid is very strong and...
depends on the temperature
Liquid freezes into a solid, melts in to a liquid, then evaporate into gas and then freezes back to a liquid.