Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Drawing diagrams of electronic configurations
19 practice questions
Practice questions
1–3 of 3 · Hard
Question 1
2 marks · Hard
Answer and see the solution →The diagram below represents the electronic configuration of an atom using shells and electrons:
Electronic configuration of an atom X Shell 1 contains 2 electrons, shown as crosses or dots. Shell 2 contains 4 electrons, shown as crosses or dots.
Interpret this diagram to answer the following:
(a)[1 mark]How many electrons are present in atom X?
(b)[1 mark]State the electronic configuration of atom X using numbers to show the electrons in each shell.
Question 2
5 marks · Hard
Answer and see the solution →Answer the following about the rules for filling electron shells up to the third shell.
(a)State the maximum number of electrons that can occupy:
(i)[1 mark]the first shell
(ii)[1 mark]the second shell
(iii)[1 mark]the third shell, up to atomic number 10
(b)[1 mark]Describe the order in which electrons fill these shells in an atom.
(c)[1 mark]Explain why the first shell is always filled before electrons occupy the second shell.
Question 3
2 marks · Hard
Answer and see the solution →Draw a diagram to show the electronic configuration of an atom of fluorine (atomic number 9). Represent the shells as circles and the electrons as dots or crosses.