Q BankQuestion BankDocsDocuments

2.5 Simple molecules and covalent bonds

Syllabus
0620–2026–2027
Topic
2.5
Level
—

2.5.1—Covalent bond is formed when a pair of

  • State: a covalent bond is formed when a pair of electrons is shared between two atoms leading to noble gas electronic configurations

2.5.2—Formation of covalent bonds in simple

  • Describe formation of covalent bonds in simple molecules, including H2, Cl2, H2O, CH4, NH3 and HCl. Use dot-and-cross diagrams to show the electronic configurations in these and similar molecules

2.5.3—Simple molecular compound properties

  • Describe simple molecular compound properties from structure/bonding: low melting/boiling points and poor electrical conductivity

2.5.4—Formation of covalent bonds in simple

  • Describe formation of covalent bonds in simple molecules, including CH3OH, C2H4, O2, CO2 and N2. Use dot-and-cross diagrams to show the electronic configurations in these and similar molecules

2.5.5—Simple molecular compound properties

  • Explain simple molecular compound properties: low melting/boiling points due to weak intermolecular forces, and poor electrical conductivity

Objective notes

5 learning objectives
ConceptIGCSE Chemistry