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
151–160 of 423 · Normal
Question 151
1 mark · Normal
Answer and check →Which statement correctly explains the similarity in chemical properties between lithium and potassium?
- A.They are both in Group 1 and have the same number of outer-shell electrons.
- B.They are both metals and have atoms with the same atomic mass.
- C.They each form oxides that are acidic.
- D.They are both in the same period of the periodic table.
Question 152
2 marks · Normal
Answer and see the solution →State two differences between metals and non-metals as found in the periodic table or their oxides.
Question 153
4 marks · Normal
Answer and see the solution →This question is about the inertness of noble gases and group similarities.
(a)[2 marks]State the number of electrons in the outer shell for neon and argon.
(b)[2 marks]Explain why these elements have very similar chemical properties.
Question 154
3 marks · Normal
Answer and see the solution →The table below shows four elements, their position in the periodic table, and the formula of the oxide formed when each reacts with oxygen:
Periodic table position and oxide formulae Element Group Period Formula of oxide A 2 3 MgO B 7 2 Cl2O7 C 1 2 Na2O D 6 3 SO3 (a)[2 marks]Classify each element in the table as a metal or a non-metal based on its position in the periodic table.
(b)[1 mark]Use the character of their oxides to explain your classifications for element C and element D.
Question 155
2 marks · Normal
Answer and see the solution →State one example of a metal and one example of a non-metal. For each, identify whether it conducts electricity or not.
Question 156
4 marks · Normal
Answer and see the solution →(a)[2 marks]State what is meant by a basic oxide and give one example of a basic oxide formed by a metal.
(b)[2 marks]Explain, using a chemical equation, how an acidic oxide formed by a non-metal reacts with an alkali.
Question 157
3 marks · Normal
Answer and see the solution →Titanium is a metal with a melting point of about 1670°C, and sulfur is a non-metal with a melting point of about 115°C. Calculate the difference in melting points between titanium and sulfur. Give your answer and then, using this data, explain one difference in the physical properties of metals and non-metals.
Question 158
3 marks · Normal
Answer and see the solution →Graphite is a form of carbon, a non-metal. Unlike most non-metals, graphite conducts electricity. Explain why graphite is an exception among non-metals in terms of electrical conductivity.
Question 159
4 marks · Normal
Answer and see the solution →Some metal and non-metal oxides and their reactions Oxide Type Reacts with acid? Reacts with alkali? CuO Metal Yes No SO2 Non-metal No Yes Al2O3 Metal Yes Yes CO Non-metal No No (a)[1 mark]Identify one oxide in the table that is amphoteric.
(b)[1 mark]Give a reason for your answer to (a).
(c)[1 mark]State which oxide in the table is neutral.
(d)[1 mark]Name one oxide that reacts with alkalis to form salts.
Question 160
1 mark · Normal
Answer and check →Which of the following is a common physical property of most non-metals?
- A.They are shiny when polished.
- B.They are malleable.
- C.They are brittle when solid.
- D.They conduct electricity well.