The working principle of metals is mainly based on their physical and chemical properties, which make metals perform well in various applications. Metals have basic properties such as luster, ductility, electrical conductivity and thermal conductivity, which make them widely used in industry and daily life.
Physical and Chemical Properties of Metals
Luster: The surface of metals is smooth and can reflect light, forming a luster.
Ductility: Metals can be stretched into thin sheets or drawn into filaments without breaking.
Conductivity: The free electrons inside the metal can move under the action of the electric field, so it has good electrical conductivity.
Thermal Conductivity: The free electrons inside the metal can transfer heat, so it has excellent thermal conductivity.
Hardness: The hardness of different metals varies greatly. For example, chromium has the highest hardness, while mercury has the lowest hardness (in liquid state).
