Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Chapter
Ionic Bonding
143 practice questions
Topics covered
- Ionic bonding in magnesium oxide19 practice questions
- Other examples of ionic bonding19 practice questions
- Calcium chloride19 practice questions
- Formulae for ionic compounds18 practice questions
- Giant ionic structures19 practice questions
- The physical properties of ionic substances19 practice questions
- The electrical conductivity of ionic substances19 practice questions
Practice questions
31–40 of 143
Question 31
3 marks · Normal
Answer and see the solution →Phosphorus (P) forms an ion with the same number of electrons as argon (Ar).
Explain how this is possible. In your answer, include:
(a)[1 mark]The change in electron number
(b)[1 mark]The charge on the ion
(c)[1 mark]A reason why phosphorus forms this ion
Question 32
4 marks · Normal
Answer and see the solution →The table shows information about four elements and their ions.
Element Group Atomic number Ion formed Number of electrons in ion Calcium 2 20 Ca2+ Chlorine 7 17 Cl– Potassium 1 19 K+ Oxygen 6 8 O2– (a)[2 marks]Complete the column for 'Number of electrons in ion' in the table above.
(b)[2 marks]Which two ions in the table are isoelectronic with argon? Give a reason for your answer.
Question 33
1 mark · Normal
Answer and check →Which of the following ions has the same number of electrons as a neon atom?
- A.Na+
- B.Mg2+
- C.F–
- D.All of the above
Question 34
2 marks · Normal
Answer and see the solution →State the type of ion formed by barium (Ba) and how it achieves a noble gas electron configuration.
Question 35
4 marks · Normal
Answer and see the solution →Iodine (I) is in Group 7 of the periodic table.
(a)[1 mark]How many electrons does an iodine atom gain or lose to form an ion?
(b)[1 mark]What is the charge on an iodide ion?
(c)[1 mark]Write the electron configuration of the iodide ion.
(d)[1 mark]Name the noble gas that has the same number of electrons as the iodide ion.
Question 36
2 marks · Hard
Answer and see the solution →A calcium atom (Ca) forms a Ca ion. Describe what happens to the atom when it forms this ion and explain why it forms an ion with a charge of 2+.
Question 37
5 marks · Hard
Answer and see the solution →Phosphorus is a Group 5 element with atomic number 15.
(a)[1 mark]Describe how a phosphorus atom forms a phosphide ion ().
(b)[1 mark]Write the electronic configuration of a phosphide ion.
(c)[2 marks]Explain why the phosphide ion is isoelectronic with a noble gas atom. Name the noble gas.
(d)[1 mark]State the total number of electrons in a phosphide ion.
Question 38
2 marks · Hard
Answer and see the solution →Explain why a bromide ion () has the same number of electrons as a krypton atom.
Question 39
1 mark · Easy
Answer and see the solution →State the number of electrons transferred from a lithium atom to a fluorine atom when lithium fluoride is formed.
Question 40
3 marks · Easy
Answer and see the solution →(a)[1 mark]State the formula of the calcium ion formed in calcium chloride.
(b)[1 mark]State the formula of the chloride ion formed in calcium chloride.
(c)[1 mark]Draw a dot-and-cross diagram to show the ions in calcium chloride.