Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Principles of Chemistry
991 practice questions
Topics covered
- States of Matter102 practice questions
- Elements, Compounds and Mixtures69 practice questions
- Atomic Structure108 practice questions
- The Periodic Table103 practice questions
- Chemical Formulae, Equations and Calculations Part 119 practice questions
- Chemical Formulae, Equations and Calculations Part 2144 practice questions
- Ionic Bonding143 practice questions
- Covalent Bonding68 practice questions
- Metallic Bonding19 practice questions
- Electrolysis198 practice questions
Practice questions
161–161 of 161 · Hard
Question 161
9 marks · Hard
Answer and see the solution →This question is about structure and bonding in ionic and covalent compounds.
(a)[2 marks]Explain why the electrostatic attraction in ionic bonding is strong, using magnesium oxide (MgO) as an example.
(b)Sodium chloride (NaCl) and methane (CH₄) both contain strong bonds between atoms. However, their physical properties are very different.
(i)[2 marks]Describe the structure and bonding present in sodium chloride and in methane.
(ii)[2 marks]State and explain ONE major difference in physical property between sodium chloride and methane by referring to their structure and bonding.
(c)Graphite is a form of carbon with a giant covalent structure. It conducts electricity, but diamond does not.
(i)[3 marks]Explain, in terms of structure and bonding, why graphite conducts electricity but diamond does not.