Question 1
FMethane, CH4\mathrm{CH_{4}}CH4, is a simple molecule.
A teacher shows students four different models of a methane molecule, A, B, C and D.
In models C and D, the large dark ball is the carbon atom and the small white balls are hydrogen atoms.
a.[1]
How many covalent bonds are there in one molecule of methane?
b.[1]
How many electrons are shared altogether in one molecule of methane?
c.[6]
Evaluate the four models of methane.
For each model, describe what it shows well and what it does not show.
2.2 Bonding Questions
64 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.