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
41–50 of 103
Question 41
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 42
2 marks · Easy
Answer and see the solution →Explain why all elements in Group 7 have seven electrons in their outer shell.
Question 43
3 marks · Easy
Answer and see the solution →The table shows electronic configurations for four elements.
Electronic configurations of four elements Element Electronic configuration Q 2,8,5 R 2,8,8,2 S 2,5 T 2,8,3 (a)[1 mark]Which element is in Period 2?
(b)[1 mark]Which element is in Group 5?
(c)[1 mark]State the number of electrons in the outer shell of element R.
Question 44
1 mark · Easy
Answer and see the solution →Write the group number for an element with electronic configuration 2,8,8,6.
Question 45
3 marks · Easy
Answer and see the solution →Consider the element aluminium, which has atomic number 13.
(a)[1 mark]Write its electronic configuration.
(b)[1 mark]State the number of shells occupied by electrons.
(c)[1 mark]Identify the group number and period number for aluminium.
Question 46
2 marks · Easy
Answer and see the solution →An atom of chlorine has atomic number 17. Calculate the number of electrons in its second shell.
Question 47
2 marks · Normal
Answer and see the solution →State the number of electron shells and the number of electrons in the outer shell for an atom of phosphorus (atomic number 15).
Question 48
4 marks · Normal
Answer and see the solution →(a)[1 mark]Complete the electronic configuration for calcium (atomic number 20).
(b)[1 mark]State the group and period of calcium in the Periodic Table.
(c)[2 marks]Explain what the group and period numbers tell you about calcium’s electron arrangement.
Question 49
3 marks · Normal
Answer and see the solution →Argon is a noble gas with atomic number 18. Calculate the number of electrons in its outer shell and state which group and period it belongs to.
Question 50
3 marks · Normal
Answer and see the solution →Barium is in Group 2 and Period 6 of the Periodic Table. Explain how you can tell, from its position, the number of electrons in its outer shell and the number of electron shells it has.