Which one of the following is NOT a typical property of transition metals?HardPoor conductors of heatDuctileGood conductors of electricity

To determine which option is NOT a typical property of transition metals, let's analyze each of the choices:

1. Hard: Transition metals are generally known for their hardness and strength. They tend to have a high melting point and are often used in applications requiring durable materials.

2. Poor conductors of heat: This is NOT a typical property of transition metals. In fact, transition metals are usually good conductors of heat due to the presence of free-moving electrons, which facilitate heat transfer.

3. Ductile: Transition metals are indeed ductile. This means they can be drawn into wires without breaking, which is a common characteristic of metals.

4. Good conductors of electricity: Similar to their thermal conductivity, transition metals are also good conductors of electricity for the same reasons—they have free electrons that can move easily throughout the metal.

Conclusion:

Based on this analysis, the option that is NOT a typical property of transition metals is Poor conductors of heat. Transition metals are actually good conductors of both heat and electricity.