Chemical Bonding (Oxford AQA IGCSE Chemistry)
Revision Note
Author
Alexandra BrennanExpertise
Chemistry
Combining Atoms
A compound is a substance in which atoms of two or more elements are chemically combined
When atoms combine, they do so in order to achieve a full outer shell of electrons and become chemically stable
This arrangement of electrons would be the same as that of a noble gas
Examples of compounds
Chemical bonding involves either transferring or sharing electrons
These form between metals and non-metals when electrons are transferred
The atoms involved are oppositely charged particles (known as ions) in which electron transfer occurs
The opposite charges attract through electrostatic forces Ionic bonds
These bonds form when non-metal atoms share pairs of electrons between each other
Exam Tip
Remember: Every atom wants to achieve a stable electron configuration, like that of the noble gases.
Noble gases are unreactive due to already having full outer shells of electrons.
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