Edexcel IGCSE Chemistry · Spec 1.45-1.48
Covalent Bonds, Dot-and-Cross Diagrams and Boiling Points
Covers explain the electrostatic attraction in a covalent bond, Draw the required range of simple molecules and Link relative molecular mass to melting and boiling point.
Chemistry revision video
Covalent Bonds, Dot-and-Cross Diagrams and Boiling Points
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Spec 1.45-1.48
What you need to know
- Explain the electrostatic attraction in a covalent bond
- Draw the required range of simple molecules
- Link relative molecular mass to melting and boiling point
Active recall
Quick check
Answer each question before opening the answer.
What is a covalent bond?
A shared pair of electrons
Which bonds are broken when a simple molecular substance boils?
Intermolecular attractions are overcome; covalent bonds are not broken
What general trend occurs as Mr increases?
Melting and boiling points generally increase
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