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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 11
H

A student is given a mixture of sand and sodium chloride. Sand is insoluble in water. Sodium chloride is soluble in water.

a.

Describe a method the student could use to obtain a pure, dry sample of sand and a pure, dry sample of sodium chloride from this mixture.

[6]
b.

Explain why sodium chloride is a compound and not a mixture.

[2]
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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