CAS CH 102 Study Guide - Final Guide: Fractional Distillation, Covalent Bond, Nonmetal
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28 Mar 2014
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This occurs in metals and is when electrons are given out from the metal atoms to make a sea of free electrons in between all of the metal atoms. These free electrons hold the metal as a mass together. This is known as being a giant structure. The free electrons present make it possible for electricity to be transferred easily because the charge is carried by them. Because the metal atoms have lost electrons, they have a positive charge. This occurs typically between a metal and a non-metal (from groups 1 + 2 and 6 + 7 on the periodic table). The metal atom loses electrons which are taken by the non- metal. Therefore, the metal ion produced has a positive charge and the non-metal ion is negatively charged. Sodium (metal - group 1) + chlorine (non-metal - group 7) ----> sodium. In the example below, the sodium atom has lost an electron to form a positive ion.
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