Greetings!
The answer would be ~ Gold. All metals are good conductors. But some however may be slower than others. Gold is not that great of a conductor, but is the best choice on here.
Hope this helps!
~DL
Mass of copper atom is
and density of copper atom is
.
First calculate the volume from density and mass as follows:

Now, convert
to
,

Thus,

Now,

Thus,

or,
m=8.92 g
The molar mass of copper is 63.54 g/mol thus, number of moles can be calculated as:

Now, in 1 mol of Cu there are
atoms, number of atoms in 0.1403 mol will be:

Answer:
By heating all the water molecules which changes the thermal energy of the food
Explanation: