Specification Point 1.44:
Know that a covalent bond is formed between atoms by the sharing of a pair of electrons

Covalent Bonds between Non-Metals

When two or more non-metals share electrons to fulfill their outer electron shell, they form a bond called covalent bond.

Covalent Bond: Bond between non-metal and non-metal formed by a shared pair of electrons between the two atoms.

Example:

Covalent bond of HCl, Edexcel IGCSE Chemistry

A covalent compound of Hydrogen Chloride (HCl)

Specification Point 1.45:
Understand covalent bonds in terms of electrostatic attractions

Electrostatic Attractions

Covalent Bond: Bond between non-metal and non-metal formed by a shared pair of electron between the two atoms.

  • There is a strong attraction between the shared pair of electrons and the nuclei of the atoms involved.

Diagram:

Positive nuclei, Edexcel IGCSE Chemistry

The attraction between the shared pair of electrons and the nuclei of the atoms involved in a covalent bond

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Author: Jamie

Jamie got a First class degree in Chemistry from Oxford University before going on to teach chemistry full time as a professional tutor. He’s put together these handy revision notes to match the Edexcel IGCSE Chemistry specification so you can learn exactly what you need to know for your exams.