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2.1 Chemical bonds, ionic, covalent and metallic

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Question 5

Element R has the electronic structure 2,8,8,1.

Element Q has the electronic structure 2,8,6.

R reacts with Q to form a solid compound.

A student made a model of the solid using 4 balls to represent R ions and 4 balls to represent Q ions. The balls were arranged alternately at the corners of a cube and joined by sticks. The student wrote:

'The model shows that the formula of the compound is RQ. The solid is made of RQ molecules, and each ion is held only by the sticks joining it to its neighbours.'

Use the electronic structures to describe how R and Q form ions and to deduce the formula of the compound. Evaluate the student's model and statement.

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2.1 Chemical bonds, ionic, covalent and metallic Questions

  1. GCSE
  2. /Chemistry
  3. /2.1 Chemical bonds, ionic, covalent and metallic

98 exam-style questions on AQA GCSE Chemistry 2.1 Chemical bonds, ionic, covalent and metallic, covering 2.1.1 Chemical bonds, 2.1.2 Ionic bonding, 2.1.3 Ionic compounds, 2.1.4 Covalent bonding, and 2.1.5 Metallic bonding. Each one has a worked solution and a mark scheme showing where the marks go.

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