# 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.

> Cambridge International IGCSE Chemistry (0620) — 8.4 Transition elements · State · 4 marks

## Mark scheme (4 marks)

1. Iron has a higher melting point / boiling point than sodium (a Group I metal)
2. Iron has a higher density than sodium (a Group I metal)
3. Compounds of transition elements are often coloured / coloured ions in solution
4. Transition elements / their compounds can act as catalysts

## Key terms

- [transition element](https://www.gradenine.co.uk/glossary/transition-element)
- [Group I metal](https://www.gradenine.co.uk/glossary/group-i-metal)

## Related

- [Revision notes for Cambridge International IGCSE Chemistry (0620)](https://www.gradenine.co.uk/learn)
- [How to answer "State" questions](https://www.gradenine.co.uk/tools/command-word-cheatsheet)
- [Practice this with AI marking (free)](https://www.gradenine.co.uk/start)

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Source: [GradeNine](https://www.gradenine.co.uk/q/iron-is-a-transition-element-state-9e10dde1) · Published by Druglandscape Ltd.