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2.5 Types of substance

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Question 9
H

A sample of graphite contains 1000 carbon atoms. Assume that every atom is bonded in the same way as an atom in the middle of a layer.

How many carbon-carbon covalent bonds, and how many delocalised electrons, does the sample contain?

[1]
A

1500 covalent bonds and 1000 delocalised electrons

B

3000 covalent bonds and 1000 delocalised electrons

C

2000 covalent bonds and no delocalised electrons

D

1500 covalent bonds and 3000 delocalised electrons

Markscheme

2.5 Types of substance Questions

  1. GCSE
  2. /Chemistry
  3. /2.5 Types of substance

48 exam-style questions on Edexcel GCSE Chemistry 2.5 Types of substance, covering 2.5.1 Classifying substances by structure and bonding, 2.5.2 Properties of ionic and simple molecular substances, 2.5.3 Giant covalent structures: diamond and graphite, 2.5.4 Fullerenes, graphene and simple polymers, 2.5.5 Properties of metals and non-metals, and 2.5.6 Limitations of bonding models and representations. Each one has a worked solution and a mark scheme showing where the marks go.

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