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2.1 Chemical bonds, ionic, covalent and metallic

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Question 13

The table gives information about the atoms in one molecule of carbon dioxide.

ElementNumber of atomsElectrons in the outer shell of each atomElectrons in a full outer shell
Carbon148
Oxygen268
a.

Calculate how many extra outer-shell electrons are needed to give a full outer shell to:

  • the carbon atom
  • the two oxygen atoms in total.
[2]
b.

A student represents the bonding in carbon dioxide as O-C-O\text{O-C-O}O-C-O.

Explain why this is incorrect.

Give the correct representation of the bonding in carbon dioxide, using lines to show the bonds.

[3]
Markscheme

2.1 Chemical bonds, ionic, covalent and metallic Questions

  1. GCSE
  2. /Chemistry
  3. /2.1 Chemical bonds, ionic, covalent and metallic

98 exam-style questions on AQA GCSE Chemistry 2.1 Chemical bonds, ionic, covalent and metallic, covering 2.1.1 Chemical bonds, 2.1.2 Ionic bonding, 2.1.3 Ionic compounds, 2.1.4 Covalent bonding, and 2.1.5 Metallic bonding. Each one has a worked solution and a mark scheme showing where the marks go.

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