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2.2 How bonding and structure are related to the properties of substances

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Question 10

A materials scientist compares two covalent materials for a furnace support. The support reaches 900 ∘C900\ ^\circ\text{C}900 ∘C and must remain solid.

MaterialStructureMelting point
PSeparate, very large chain molecules180 ∘C180\ ^\circ\text{C}180 ∘C
QAll atoms joined together in a continuous network2600 ∘C2600\ ^\circ\text{C}2600 ∘C
a.

Explain why material Q has a much higher melting point than material P.

[3]
b.

State which material meets the temperature requirement. Explain your answer.

[2]
Markscheme

2.2 How bonding and structure are related to the properties of substances Questions

  1. GCSE
  2. /Chemistry
  3. /2.2 How bonding and structure are related to the properties of substances

84 exam-style questions on AQA GCSE Chemistry 2.2 How bonding and structure are related to the properties of substances, covering 2.2.1a The three states of matter, 2.2.1b Limitations of the simple particle model, 2.2.2 State symbols in chemical equations, 2.2.3 Properties of ionic compounds, 2.2.4 Properties of small molecules, 2.2.5 Polymers, 2.2.6 Giant covalent structures, 2.2.7 Properties of metals and alloys, and 2.2.8 Metals as conductors. Each one has a worked solution and a mark scheme showing where the marks go.

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