Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Other examples of ionic bonding
19 practice questions
Practice questions
1–3 of 3 · Hard
Question 1
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 2
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 3
2 marks · Hard
Answer and see the solution →Explain why a bromide ion () has the same number of electrons as a krypton atom.