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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 16

A reaction changes Cu2+\text{Cu}^{2+}Cu2+ ions into neutral copper atoms, Cu\text{Cu}Cu.

Which half equation is balanced for this reaction?

[1]
A

2Cu2++2e−→2Cu2\text{Cu}^{2+} + 2\text{e}^- \rightarrow 2\text{Cu}2Cu2++2e−→2Cu

B

Cu2+→Cu+2e−\text{Cu}^{2+} \rightarrow \text{Cu} + 2\text{e}^-Cu2+→Cu+2e−

C

Cu2++e−→Cu\text{Cu}^{2+} + \text{e}^- \rightarrow \text{Cu}Cu2++e−→Cu

D

Cu2++2e−→Cu\text{Cu}^{2+} + 2\text{e}^- \rightarrow \text{Cu}Cu2++2e−→Cu

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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

93 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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