Explanation

tungsten is also among the heaviest metals.

Its electrical conductivity at 0 °C is about 28% of that of silver which itself has the highest conductivity of all metals.

Tungsten has the chemical symbol W

and is element 74 of the periodic table.

while 

Silver is the first-best conductor of heat.

Copper is the second-best conductor of heat.****

ND10-1-2023