Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Ionic bonding in magnesium oxide
19 practice questions
Practice questions
1–8 of 8 · Easy
Question 1
1 mark · Easy
Answer and see the solution →What type of force holds the magnesium ions and oxide ions together in magnesium oxide?
Question 2
3 marks · Easy
Answer and see the solution →For the ionic compound magnesium oxide (MgO):
(a)[1 mark]State the charge of a magnesium ion.
(b)[1 mark]What is the charge on an oxide ion?
(c)[1 mark]Name the type of ion formed by magnesium.
Question 3
2 marks · Easy
Answer and see the solution →Draw a dot-and-cross diagram to show the electron arrangement in the Mg^{2+} ion. Use dots for magnesium's original electrons. Clearly show the charge.
Question 4
2 marks · Easy
Answer and see the solution →Explain why magnesium oxide has a high melting point. Use your knowledge of ionic bonding in your answer.
Question 5
3 marks · Easy
Answer and see the solution →The table shows the number of electrons in neutral atoms and the corresponding ions for magnesium and oxygen.
Particle Number of electrons Mg atom 12 Mg^{2+} ion O atom 8 O^{2-} ion (a)[2 marks]Complete the table by filling in the missing numbers for the ions.
(b)[1 mark]Explain, in terms of electron transfer, how these ions form.
Question 6
1 mark · Easy
Answer and see the solution →How many electrons are in the outer shell of an oxide ion (O^{2-})?
Question 7
3 marks · Easy
Answer and see the solution →This question is about the ionic bonding in magnesium oxide.
(a)[2 marks]Describe what happens to the electrons when magnesium and oxygen react to form magnesium oxide.
(b)[1 mark]Explain why there are strong forces of attraction between the ions in magnesium oxide.
Question 8
2 marks · Easy
Answer and see the solution →A magnesium atom has 12 electrons and an oxide ion has 10 electrons. Calculate the total number of electrons present in one unit of magnesium oxide (MgO).