CHEM - Ionic Bonding
Chemistry, ions, ionic compounds, ionic bonding - IGCSE | IBDP | DSE | GCE | AP Chemistry
Ionic bonding is an important concept you need to know for IGCSE Chemistry:
Ions are formed when atoms gain or lose electrons to form full outer shell.
Metals: lose electrons and form positively charged ions
Non-metals: gain electrons and form negatively charged ions
For example, a magnesium atom loses the two outer electrons and becomes a magnesium ion.
Similarly, an oxygen atom gains two electrons and becomes an oxide ion.
These are the ionic charges of common ions that you should know 👇
Ionic Compounds and Ionic Bonds
Ionic compounds are formed when a metal transfers electrons to a non-metal.
Ionic bonds from between positively charged ions and negatively charged ions due to electrostatic attraction between opposite charges.
Example 1. Formation of magnesium oxide (MgO)
Example 2. Formation of magnesium chloride (MgCl2)
Ions in an ionic compound are arranged in a regularly repeating pattern called the ionic lattice.
Ionic lattices are formed because there is a strong electrostatic force acting between ions.
👆 This is an example of a 3D ionic lattice formed by sodium chloride (NaCl).
Properties of Ionic Compounds
I. High Melting and Boiling Points
II. Electricity Conduction
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