Question

Name a metal which is a bad conductor of heat and electricity?

Answer 1

Conductors allow the passage of heat and electricity while bad conductors do not allow the passage of heat and electricity. Bad conductors are also called insulators. Because the atoms in metals form a matrix through which outside electrons can easily travel, metals are good conductors of electricity and heat.

Complete Step By Step Answer:
Tungsten ( $W$ ) is a chemical element with the atomic number $76$ .
It's a transition metal, meaning it's in the middle of the periodic table.
Metals are known to be good conductors of electricity. This is due to the fact that metals have free electrons that can conduct electricity. The mobility of electrons is what causes metals to have strong conductivity.
Tungsten should conduct electricity because it is a metal. Tungsten, on the other hand, is an exception, as it does not conduct electricity under typical conditions.
We also know that when the group number decreases, the size of the metal grows, and Tungsten is the heaviest metal in group 6. Ongoing down the group, the melting point of the metal increases due to increase in size. As a result, we can state that tungsten has a high melting point and a high heat resistivity. Because there are more electrons, the strength of Vander Waals forces increases as you go down. As a result, more energy is needed. This is why the melting point is so high.
Despite being a metal, tungsten is a poor conductor of heat and electricity. It will, however, conduct electricity at high temperatures.

Note:
Tungsten is employed as the filament of the bulb because of the features indicated above. Despite being a poor conductor of electricity, it is used in a bulb because of its high melting point and great heat resistance.