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
601–610 of 991
Question 601
5 marks · Hard
Answer and see the solution →Calcium chloride is formed when calcium reacts with chlorine.
(a)[1 mark]State the electronic configuration of a calcium atom and a chlorine atom.
(b)[2 marks]Explain how calcium and chlorine atoms achieve full outer shells when forming calcium chloride.
(c)[2 marks]Draw a dot-and-cross diagram to show the ions formed in calcium chloride. Show only the outer shells.
Question 602
2 marks · Hard
Answer and see the solution →State the charge on each ion and the number of electrons in the outer shell of each ion in lithium fluoride.
Question 603
1 mark · Easy
Answer and see the solution →Write the formula for the ionic compound formed between aluminium ions and chloride ions.
Question 604
3 marks · Easy
Answer and see the solution →(a)[1 mark]State the formula of the calcium ion and the oxide ion.
(b)[1 mark]What is the simplest formula for the ionic compound formed from these ions?
(c)[1 mark]Explain why the compound has this formula.
Question 605
2 marks · Easy
Answer and see the solution →Calculate the formula for the ionic compound formed when magnesium ions combine with nitrate ions. Show how the charges are balanced in your answer.
Question 606
2 marks · Easy
Answer and see the solution →Ammonium sulfate has the formula (NH4)2SO4. Explain why two ammonium ions are needed in this compound.
Question 607
1 mark · Easy
Answer and see the solution →State the formula for the ionic compound formed when sodium ions combine with bromide ions.
Question 608
3 marks · Easy
Answer and see the solution →The ions formed by magnesium and sulfur combine to make an ionic compound.
(a)[1 mark]State the symbol and charge of the ion formed by magnesium.
(b)[1 mark]State the symbol and charge of the ion formed by sulfur.
(c)[1 mark]Write the formula for the ionic compound formed from these ions.
Question 609
2 marks · Easy
Answer and see the solution →Calculate the correct formula for the ionic compound made from barium ions and hydroxide ions. Show your working.
Question 610
2 marks · Normal
Answer and see the solution →State the formulae for the following ionic compounds:
(a)[1 mark]potassium sulfide
(b)[1 mark]aluminium nitrate