Which of the following is not a property of a metal?
Luster
Malleability
Permeability****
Ductility
https://www.thoughtco.com/properties-basic-metals-element-group-606654
To determine which of the options is not a property of a metal, we can review the definitions of each property.
1. Luster: Luster refers to the ability of a material to reflect light. Metals are generally known to have luster, meaning they are shiny and reflective.
2. Malleability: Malleability refers to the ability of a material to be hammered or rolled into thin sheets without fracturing or breaking. Metals, such as gold and silver, are known to be malleable.
3. Permeability: Permeability is the measure of a material's ability to allow liquids or gases to pass through it. Metals are not typically permeable. They are known to be good conductors of heat and electricity but generally do not allow the flow of gases or liquids through them.
4. Ductility: Ductility refers to the ability of a material to be stretched into thin wires without breaking. Metals, such as copper and aluminum, exhibit ductility.
Based on these definitions, we can conclude that permeability is not a property of metals. Metals are generally not permeable to liquids or gases.