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
21–30 of 43 · Easy
Question 21
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 22
1 mark · Easy
Answer and see the solution →Write the group number for an element with electronic configuration 2,8,8,6.
Question 23
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 24
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 25
1 mark · Easy
Answer and see the solution →State whether the element magnesium (Mg) is a metal or a non-metal.
Question 26
3 marks · Easy
Answer and see the solution →This question is about similarities in chemical properties in groups and the inertness of Group 0 elements.
(a)[1 mark]State the number of electrons in the outer shell of a fluorine atom.
(b)[1 mark]Explain why the elements in Group 7 have similar chemical properties.
(c)[1 mark]Explain why helium is unreactive.
Question 27
2 marks · Easy
Answer and see the solution →Calcium (Ca) forms an oxide when it reacts with oxygen. The formula of the oxide is either CaO or CaO2. Using your knowledge of the periodic table, determine which formula is correct for the oxide of calcium and state how many oxygen atoms are present in the formula.
Question 28
2 marks · Easy
Answer and see the solution →Explain, using your knowledge of the periodic table, why elements in Group 2 have similar chemical properties.
Question 29
1 mark · Easy
Answer and see the solution →State whether chlorine is a metal or a non-metal, based on its position in the periodic table.
Question 30
3 marks · Easy
Answer and see the solution →This question is about group trends in the periodic table.
(a)[1 mark]State how many electrons a typical Group 7 element has in its outer shell.
(b)[2 marks]Explain why the elements fluorine and bromine have similar chemical properties.