B1.1.1—Carbon atom properties
Carbon forms four strong covalent bonds, allowing chains, rings, branches, multiple bonds, and functional groups that produce diverse biological molecules.
- Syllabus
- First assessment 2025
- Objective
- B1.1.1
- Level
- HL
Exam analysis
Chance of appearing1%of analysed past papers
Latest appearanceMay 2018
Most common paperPaper1
Typical marks1
Common command terms
- Outline
- Identify
Recent exam appearances
May 2018Paper1 ["HL"] · TZ15[ 1 ]B1.1.1—Carbon atom properties
Practice this objective
Coverage 2018–2018 · Updated 15 Jul 2026
Concept essentials
- Carbon can form four covalent bonds with carbon and other non-metal elements.
- Carbon skeletons may form chains, branches and rings.
- Single and double bonds change molecular shape and properties.
- Functional groups attached to carbon skeletons give biomolecules distinctive chemical behaviour.