How do pure metals solidify

What are the properties of a pure metal?

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What are the properties of a pure metal?

Pure Metals:

  1. Typical pure metals have the following physical properties:
    • Ductile- can be drawn into fine wire
    • Malleable- can be beaten into thin sheets without cracking
    • Lustrous- becomes shiny when polished
    • High density
    • High melting and boiling points
    • Good conductor of heat and electricity
  2. These properties of pure metals are reflected by their arrangement of atoms.
  3. Pure metal is made up of only one type of atom, thus the atoms are of the same size.
  4. Since all the atoms are of the same size, in solid state, these atoms are orderly arranged and closely packed together. Thus pure metals have high density.
  5. The atoms in metal are orderly arranged in layers to form three-dimensional crystal lattice as shown in Figure.
  6. Metals have high melting and boiling points due to the existence of very strong forces of attraction between the closely-packed atoms. Thus more heat energy is required to overcome the forces of attraction.
  7. Although the forces of attraction between the atoms are strong, pure metals are weak and soft due to their ductility and malleability and have limited use.
  8. Pure metals are ductile and soft because all the atoms are of the same size and orderly arranged, thus the layers of atoms can slide over one another easily when a force is applied.
  9. Pure metals are malleable, weak and can be shaped. This is because there are some empty spaces in between the atoms of pure metals. When a metal is knocked or pressed, groups of atoms may slide and settle into new positions due to the imperfection.
  10. Because pure metals are ductile and malleable, they are relatively soft and easily oxidised to form metal oxides.
  11. To improve the properties of a pure metal, it is made into alloy.

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