In Sec 2, we have learnt about 2 different forms of chemical bonding. These are ionic bonding and covalent bonding.
Ionic Bonding
Ionic bonding takes place between two or more elements whereby electrons are transferred from one atom to another. This would form ions, and an ionic compound. This takes place between metal and non-metal elements. Examples of ionic compounds are NaCl-Sodium Chloride, CaCl2-Calcium Chloride.
Convalent Bonding
Covalent bonding takes place between metal to metal, or non-metal to non-metal elements. It is a process whereby the electrons are shared between the two elements. For example, Oxygen has an electron configuration of 2.6 . Therefore, it requires 2 more electrons to complete its valence shell and be a stable atom. As such, an oxygen atom would share two electrons with another oxygen atom, and would form the oxygen molecule, O2. Other examples are H2-Hydrogen molecule and H2O-water
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