CAIE IGCSE Chemistry Metallic Lattice and Electron Sea
Practise drawing and labelling the metallic lattice model and defining the bond as attraction between positive ions and delocalised electrons.
- Syllabus
- 2026–2028
- Course
- Chemistry 0620
Exam points
- draw a regular lattice of positive metal ions surrounded by a sea of delocalised electrons
- label the ions and mobile electrons clearly and include appropriate ionic charges when asked
- state that metallic bonding is electrostatic attraction between positive ions and electrons
2.7.1—Metallic bonding as the electrostatic question 1
[Maximum number: 4]
Iron is a transition element. Potassium is a Group I element.
Iron and potassium have the same type of bonding.
Name and describe the type of bonding in these two elements.
name
description
metallic (1)
(lattice of) positive ions (1)
sea of / delocalised / mobile electrons (1)
attraction between positive ions and electrons (1)
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