Answer:
Metallic solids: Metallic solids: Solids in which constituent particles are held by metallic bond are called metallic solids.
Examples: Iron, copper, silver, sodium, magnesium, aluminium, etc.
Metallic solids are made of metal ions and electrons. These are formed by three dimensional arrangements of metal ions surrounded by electrons.
Characteristics of metallic solids
Metallic solids have high electrical and thermal conductivity due to the presence of free mobile electrons.
When an electric field is applied, these mobile electrons flow through the network of positive ions. This is why metallic solids are good conductors of electricity.
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