Question 3
FScientists' ideas about atoms have changed over time.
The diagrams show four models of the atom, A, B, C and D.
a.[2]
Put the four models in order, from the oldest to the newest.
Write the letters.
b.[1]
Which model is the "plum pudding" model?
c.[1]
Model C does not include a particle that was discovered later. This particle is found in the nucleus and has no charge.
Name this particle.
d.[1]
Model A shows atoms as tiny solid spheres that cannot be divided.
Give one reason why scientists now know this idea is wrong.
e.[2]
Explain why scientists change the model of the atom.
1.2 Atomic structure Questions
51 exam-style questions on OCR GCSE Chemistry 1.2 Atomic structure, covering 1.2.1 Development of the atomic model, 1.2.2 The nuclear model and the size of atoms, and 1.2.3 Subatomic particles in atoms and ions. Each one has a worked solution and a mark scheme showing where the marks go.