A space-filling model is used to represent a molecule of water, H2O\text{H}_2\text{O}H2O.
Which feature of the molecule is hardest to see in this model?
The relative sizes of the atoms.
That the atoms are touching.
The bonds between the atoms.
The overall shape of the molecule.
122 exam-style questions on OCR GCSE Chemistry 2.2 Bonding, covering 2.2.1 Metals, non-metals and the Periodic Table, 2.2.2 Types of chemical bonding and dot and cross diagrams, 2.2.3 Limitations of bonding models, and 2.2.4 Reactivity, atomic number and the modern Periodic Table. Each one has a worked solution and a mark scheme showing where the marks go.