A molecule of carbon dioxide contains one carbon atom and two oxygen atoms.
The table shows information about the atoms in one molecule.
| Atom | Number of atoms | Outer-shell electrons in each atom before bonding | Outer-shell electrons around each atom after bonding |
|---|---|---|---|
| Carbon | 1 | 4 | 8 |
| Oxygen | 2 | 6 | 8 |
Each atom contributes one electron to each shared pair.
Use the information in the table to draw a dot and cross diagram for one molecule of carbon dioxide.
A student represents the bonding in carbon dioxide as O-C-O\text{O-C-O}O-C-O.
Explain why the student's representation is incorrect.
Explain why each covalent bond in a carbon dioxide molecule is strong. Answer in terms of electrostatic attraction.
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.