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Chemical Bonding
What type of bond?

The type of bond depends on the two atoms involved in the bond

Metal Non-metal
Metal Metallic bonding Ionic bonding
Non-metal Ionic bonding Covalent bonding




Properties depending on bonding

Structure Type of Melting point Solubility in Electrical
bonding water conductivity
Ionic lattice Ionic High…

Page 2

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Ionic Bonding
Compounds are atoms of different elements bonded together

- When different elements join or bond together, you get a compound
- There are two main types of bonding in compounds ­ ionic and covalent

Atoms are usually more stable if they have a full outer shell of electrons.…

Page 3

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Covalent Bonding
Molecules are formed when 2 or more atoms bond together, and are held together
by covalent bonds.

In covalent bonding, two atoms share electrons, so they've both got a full outer shell of
electrons.

Both the positive nuclei are attracted electrostatically to the shared electrons.

Bonds formed by…

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Metallic Bonding
Metal atoms cannot achieve the stable electron arrangement of a noble gas by sharing
electrons with each other of transferring electrons from one to the other ­ they don't have
enough outer shell electrons to allow them to do this.

The metal atoms therefore lose their outer shells…

Page 5

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The metallic bonding model explains why metals do what they do:


The melting points of metals are generally high because of the strong metallic bonding,
with the number of delocalised electrons per atom affecting the melting point.
The more there are, the stronger the bonding will be and the higher…

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