The diagram shows water boiling at room temperature. 

Why is the water in the sealed chamber able to boil at room temperature?

The water molecules have kinetic energy to begin with, but not enough to boil in the presence of air pressure. When we remove the air pressure, the most energetic water molecules become water vapor gas.

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.