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Which substance contains delocalised electrons? A - AQA - A-Level Chemistry - Question 22 - 2021 - Paper 3
Question 22
Which substance contains delocalised electrons? A. cyclohexane B. graphite C. iodine D. sodium chloride
Worked Solution & Example Answer:Which substance contains delocalised electrons? A - AQA - A-Level Chemistry - Question 22 - 2021 - Paper 3
Step 1
B. graphite
Answer
Graphite contains delocalised electrons. In graphite, each carbon atom is bonded to three other carbon atoms, forming layers of hexagonal structures. The fourth outer shell electron of each carbon atom is delocalised, allowing it to move freely across the layers. This delocalisation is responsible for graphite's electrical conductivity and lubricating properties.