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
21–30 of 143
Question 21
3 marks · Easy
Answer and see the solution →(a)[1 mark]State the group number of a magnesium atom in the periodic table.
(b)[1 mark]Describe what happens to a magnesium atom when it forms an ion.
(c)[1 mark]State the charge on the ion formed.
Question 22
2 marks · Easy
Answer and see the solution →A fluorine atom (atomic number 9) forms a fluoride ion. Calculate: (i) The number of protons in the fluoride ion. (ii) The number of electrons in the fluoride ion. Give both answers.
Question 23
2 marks · Easy
Answer and see the solution →Explain, using electronic configuration, why a potassium ion (K+) has the same number of electrons as an argon atom.
Question 24
3 marks · Easy
Answer and see the solution →Information about elements and their ions Element Group number Atomic number Ion formed Number of electrons in ion Calcium 2 20 Ca2+ Chlorine 7 17 Cl– Aluminium 3 13 Al3+ (a)[3 marks]Complete the table by giving the number of electrons in each ion.
Question 25
1 mark · Easy
Answer and see the solution →Which ion is formed when a nitrogen atom gains three electrons? Give the symbol, including charge.
Question 26
3 marks · Easy
Answer and see the solution →(a)[2 marks]Sodium (Na) and sulfur (S) are both elements found in the periodic table. State the group number of each element.
(b)[1 mark]Describe how the ions formed by sodium and sulfur achieve noble gas configurations.
Question 27
2 marks · Easy
Answer and see the solution →An oxygen atom (atomic number 8) forms an oxide ion. How many electrons has the oxide ion? Show your working.
Question 28
2 marks · Normal
Answer and see the solution →Describe what happens to a magnesium atom when it forms an ion. Give the charge on the ion and explain your answer.
Question 29
4 marks · Normal
Answer and see the solution →Aluminium and sulphur can both form ions.
(a)[1 mark]State the charge on the ion formed by aluminium.
(b)[1 mark]State the charge on the ion formed by sulphur.
(c)[2 marks]Explain how each atom forms its ion. Your answer should refer to the gain or loss of electrons.
Question 30
3 marks · Normal
Answer and see the solution →An atom of potassium (K, atomic number 19) forms an ion.
Calculate:
(a)[1 mark]The number of electrons in a potassium atom before ion formation.
(b)[1 mark]The number of electrons in the potassium ion after it has formed.
(c)[1 mark]The electronic configuration of the potassium ion.