how is the afore mentioned element used in the transfer of heat?
Liquid sodium is used as a heat transfer fluid in some types of nuclear reactors.
Sodium
Liquid sodium is used as a heat transfer fluid in some types of nuclear reactors because it has the high thermal conductivity and low neutron absorption cross section required to achieve a high neutron flux in the reactor. 
na is the symbol for which of the following chemical elements Sodium what is the historical story of this? In medieval Europe, a compound of sodium with the Latin name of "sodanum" was used as a headache remedy. apart from food, where else is it used? Sodium chloride is extensively used for anti-icing and de-icing and as a preservative. what is the meaning of the second icing method you just mentioned? De-icing is the process of removing snow, ice or frost from a surface. where is it commonly used? Trains, rail switches, aircraft, etc.
wiki:25611827
Sodium [SEP] Heat transfer
Liquid sodium is used as a heat transfer fluid in some types of nuclear reactors because it has the high thermal conductivity and low neutron absorption cross section required to achieve a high neutron flux in the reactor. The high boiling point of sodium allows the reactor to operate at ambient (normal) pressure, but the drawbacks include its opacity, which hinders visual maintenance, and its explosive properties. Radioactive sodium-24 may be produced by neutron bombardment during operation, posing a slight radiation hazard; the radioactivity stops within a few days after removal from the reactor. If a reactor needs to be shut down frequently, NaK is used; because NaK is a liquid at room temperature, the coolant does not solidify in the pipes.