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1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes

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Question 9
H

Scientific models of the atom have changed as new experimental evidence has been found.

a.

Describe how the model of the atom changed from the plum pudding model, to the nuclear model, and then to the model suggested by Niels Bohr. In your answer you should refer to the experimental evidence that led to each change.

[6]
b.

Later experiments showed that the positive charge of any nucleus could be divided into a whole number of smaller particles, each with the same amount of positive charge. Give the name of these particles.

[1]
Markscheme

1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes Questions

  1. GCSE
  2. /Chemistry
  3. /1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes

40 exam-style questions on AQA GCSE Chemistry 1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes, covering 1.1.1a Atoms, elements and compounds, 1.1.1b Half equations and ionic equations, 1.1.2 Mixtures, 1.1.3 The development of the model of the atom (common content with physics), 1.1.4 Relative electrical charges of subatomic particles, 1.1.5 Size and mass of atoms, 1.1.6 Relative atomic mass, and 1.1.7 Electronic structure. Each one has a worked solution and a mark scheme showing where the marks go.

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