1. Metal generally has good ductility, and the metal can be made into the required shape, such as metal mold, by using its ductility.
2. All metals have good conductivity and thermal conductivity, such as making metal into electrodes, heater dishes, etc.
3. Metals are generally solid, such as iron, copper, aluminum, etc. Only mercury is a special metal, which usually exists in liquid state.
4. Metals generally exist in the form of combined state, because metal properties are relatively active. A few metals, such as gold, platinum, silver, bismuth, and other free metals, are non oxidizing, but metal ions are oxidizing. The weaker the activity, the stronger the oxidation of ions formed by metals. All metals have reducibility. The weaker the activity is, the weaker the reducibility is.
5. Most metals can react with oxygen.