Metal

1. sturctare

1.1. crystalline solids : atoms are regularly arranged with repetition in three dimensions .

1.2. metallic bond : this is the electrostatic force of attraction between positively charged ions and delocalized outer electrons of metals.

2. properties "chemical, physical, mechanical"

2.1. crystalline solids

2.2. hard

2.3. high melting point

2.4. opaque

2.5. white color

2.6. good thermal and electrical conductivity

2.7. ductile material

3. relation

3.1. metal usually have high surface energy and so butter adhesion.

3.2. plastic deformation of a metal occurs by displacement of a row of atoms from their normal position in the lattice under applied stress .

3.3. shaping of metals by : casting , cold working

4. defi.

4.1. element ionizes positively in solution .