Sodium is a solid at room temperature, so right from the start, you know for a fact that it will go from solid to liquid at a temperature that is higher than
More specifically, sodium will go from solid to liquid, i.e. it will melt, at about
Sodium will go from liquid to vapor, i.e. it will evaporate, at about
For physical properties such as melting point and boiling point, you can always turn to Wikipedia. Check out the Wiki page for sodium for more info.