Page 138 - MATERIAL SCIENCE AND ENGINEERING PART 1
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Atomic bonding                                  1         2         3          4
                                                                          3







                     Ionic bond                            Covalent bond                             Metallic bond








                                                                                                  Properties of metallic

                                                                                                  compound:

                                                                                                  1. The valence electrons
                                                                                                     are free to move in

                                                                                                     “cloud of electrons”,

                                                                                                     thus conduct heat and

                                                                                                     electricity easily.
                                                                                                  2. The delocalized sharing

                                                                                                     of free electrons enable

                                                                                                     the atoms to slide past

                                                                                                     each other when the
                                                                                                     metal is deformed

                                                                                                     instead of fracturing like

                                                                                                     glass or brittle materials.
                                                                                                                                        123


                                                    Politeknik Ibrahim Sultan
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