Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Chapter
The Periodic Table
103 practice questions
Topics covered
- The arrangement of the electrons in an atom19 practice questions
- Drawing diagrams of electronic configurations19 practice questions
- Electronic configurations and the periodic table19 practice questions
- Metals and non-metals in the periodic table18 practice questions
- Differences between the properties of metals and non-metals19 practice questions
Practice questions
11–20 of 43 · Easy
Question 11
2 marks · Easy
Answer and see the solution →The diagram below shows the electronic configuration for an atom, with shells containing 2, 5 electrons.
(a)[1 mark]Calculate the total number of electrons in this atom.
(b)[1 mark]State the atomic number of this atom.
Question 12
2 marks · Easy
Answer and see the solution →Explain why the second electron shell fills with up to 8 electrons before the third shell begins to fill.
Question 13
3 marks · Easy
Answer and see the solution →The table below lists three elements and their atomic numbers.
Atomic numbers of selected elements. Element Atomic number Lithium 3 Beryllium 4 Oxygen 8 Complete the table by writing the number of electrons in each shell for each element.
Question 14
1 mark · Easy
Answer and see the solution →A diagram shows an atom with 2 electrons in its first shell and 6 electrons in its second shell. What is the total number of electrons in this atom?
Question 15
3 marks · Easy
Answer and see the solution →Answer the following questions about electron shells:
(a)[1 mark]State the maximum number of electrons that the second shell can hold.
(b)[1 mark]Describe the order in which electrons fill the first, second and third shells.
(c)[1 mark]Explain why electrons do not start to fill the third shell before the second shell is full.
Question 16
2 marks · Easy
Answer and see the solution →An atom has atomic number 6. Calculate the number of electrons in each shell and write its electronic configuration.
Question 17
1 mark · Easy
Answer and see the solution →State which period in the Periodic Table an element with electronic configuration 2,8,6 is found in.
Question 18
3 marks · Easy
Answer and see the solution →Magnesium has the atomic number 12.
(a)[1 mark]Write the electronic configuration of magnesium.
(b)[1 mark]State the number of electrons in its outer shell.
(c)[1 mark]Identify the group in the Periodic Table where magnesium is found.
Question 19
2 marks · Easy
Answer and see the solution →Potassium has atomic number 19. Calculate the number of electron shells occupied in a potassium atom.
Question 20
2 marks · Easy
Answer and see the solution →Explain why all elements in Group 7 have seven electrons in their outer shell.