Metallic Bonding
2 marks · NormalCalcium metal has a giant structure.
Draw and clearly label a simple 2D diagram to show the arrangement of ions and delocalised electrons in calcium metal.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
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Must show: Ca2+ ions in regular arrangement (labelled), Sea of delocalised electrons shown between ions (labelled or identified)
Also accept: Ions and electrons distinguished by symbol, label or shape
Common mistakes: Not labelling ions; Missing electrons or grouping them with ions
Show mark scheme and worked solution
Marking points
B1 · 1 mark · Diagram shows a regular array of labelled Ca2+ ions.
B2 · 1 mark · Sea of delocalised electrons shown and labelled between ions.
Worked solution
The diagram shows Ca2+ ions regularly arranged with a labelled sea of delocalised electrons between them.