Iron is a transition element. State two ways in which iron differs from sodium, a Group I metal, in terms of its physical properties, and state two ways in which the compounds of transition elements differ from the compounds of Group I metals.
Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).
Model answer (4 marks)
Iron has a higher melting point than sodium.
Iron has a higher density than sodium.
Compounds of transition elements are coloured.
Transition element compounds can act as catalysts.
Iron has a higher density than sodium.
Compounds of transition elements are coloured.
Transition element compounds can act as catalysts.
Examiner tips
- Use the word ‘has’ to state each property. Mention density and melting point for the metal. State colour and catalytic ability for the compounds.
- Avoid vague terms like ‘different’ – be specific.
Mark scheme (4 marks)
- Iron has a higher melting point / boiling point than sodium (a Group I metal)
- Iron has a higher density than sodium (a Group I metal)
- Compounds of transition elements are often coloured / coloured ions in solution
- Transition elements / their compounds can act as catalysts
Key terms in this question
transition element · Group I metal
Related
- All Cambridge International IGCSE Chemistry (0620) revision notes →
- How to answer a "State" question →
- Decode the mark scheme abbreviations →