Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Principles of Chemistry
991 practice questions
Topics covered
- States of Matter102 practice questions
- Elements, Compounds and Mixtures69 practice questions
- Atomic Structure108 practice questions
- The Periodic Table103 practice questions
- Chemical Formulae, Equations and Calculations Part 119 practice questions
- Chemical Formulae, Equations and Calculations Part 2144 practice questions
- Ionic Bonding143 practice questions
- Covalent Bonding68 practice questions
- Metallic Bonding19 practice questions
- Electrolysis198 practice questions
Practice questions
141–150 of 423 · Normal
Question 141
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 142
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.
Question 143
4 marks · Normal
Answer and see the solution →The table shows the electronic configurations and Periodic Table positions for four elements.
Electronic configurations and positions for four elements Element Electronic configuration Group Period A 2,8,4 B 2,8,8,1 C 2,7 D 2,8,5 (a)[2 marks]Complete the table by entering the group and period for each element.
(b)[2 marks]Which element is in the same group as carbon? Give a reason for your answer.
Question 144
1 mark · Normal
Answer and check →Which of the following elements is in period 2 and group 7 of the Periodic Table?
- A.Fluorine (2,7)
- B.Chlorine (2,8,7)
- C.Nitrogen (2,5)
- D.Neon (2,8)
Question 145
2 marks · Normal
Answer and see the solution →State the group and period of silicon (atomic number 14) and explain your reasoning.
Question 146
4 marks · Normal
Answer and see the solution →(a)[1 mark]Draw or describe the electronic configuration for sodium (Na, atomic number 11).
(b)[1 mark]Identify its group and period in the Periodic Table.
(c)[2 marks]Explain how sodium’s position in the Periodic Table is related to its electronic configuration.
Question 147
2 marks · Normal
Answer and see the solution →State whether each of the following elements is a metal or a non-metal. Explain how you decided in each case.
(a)[1 mark]Sodium (Na)
(b)[1 mark]Sulfur (S)
Question 148
4 marks · Normal
Answer and see the solution →This question is about group trends in the periodic table.
(a)[1 mark]Describe how the electronic configurations of chlorine and bromine are similar.
(b)[1 mark]Group 7 elements react with hydrogen to form compounds such as hydrogen chloride and hydrogen bromide. State one similarity in the formulae of these compounds.
(c)[2 marks]Explain why elements in the same group have similar chemical properties.
Question 149
3 marks · Normal
Answer and see the solution →Explain why the elements in Group 0 (the noble gases) are very unreactive. Your answer should refer to electronic structure.
Question 150
4 marks · Normal
Answer and see the solution →The table shows whether certain oxides are basic, acidic, or amphoteric.
Character of some element oxides Element Oxide formula Type of oxide Sodium \ce{Na2O} Silicon \ce{SiO2} Aluminium \ce{Al2O3} Sulfur \ce{SO2} a) Complete the table by identifying the type of oxide for each element. [2]
b) Explain how the type of oxide can help you classify each element as a metal or non-metal. [2]