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
371–380 of 991
Question 371
2 marks · Hard
Answer and see the solution →State the acid–base character of the oxides formed by sodium and chlorine. Use one phrase each.
Question 372
5 marks · Hard
Answer and see the solution →The elements magnesium and sulfur have very different properties. Answer the following questions about them.
(a)[2 marks]State two typical physical properties that distinguish metals from non-metals.
(b)[2 marks]For each of the properties stated in part (a), describe how magnesium and sulfur show these properties.
(c)[1 mark]Name one exception to a typical physical property of metals or non-metals and give a specific example.
Question 373
2 marks · Hard
Answer and see the solution →Hydrogen is found in Group 1 of the Periodic Table but is not a typical metal. Use examples to describe one way in which its electrical conductivity is different from most metals.
Question 374
5 marks · Easy
Answer and see the solution →This question is about the arrangement of electrons in atoms and representing them with diagrams.
(a)[2 marks]State what the vertical columns and horizontal rows in the Periodic Table are called.
(b)[1 mark]Phosphorus has atomic number 15. Write its electronic configuration using numbers separated by commas.
(c)[2 marks]Draw a diagram to show the arrangement of electrons in a phosphorus atom. Use circles for shells and crosses (×) for electrons.
Question 375
5 marks · Easy
Answer and see the solution →This question is about working out and interpreting electronic configurations.
(a)[1 mark]An atom has 9 electrons. Write its electronic configuration using numbers and commas.
(b)[2 marks]Below is a diagram showing the electronic configuration of an atom:
Diagram showing 2 electrons in the inner shell and 7 in the second shell. There are 2 crosses in the inner shell and 7 crosses in the second shell.
(c)[2 marks]Explain which element this atom is by giving its name and how you worked it out.
Question 376
5 marks · Easy
Answer and see the solution →This question is about calculating and understanding how to fill electron shells.
(a)[3 marks]State the maximum number of electrons that can fit in each of the first three shells for the first 20 elements.
(b)[2 marks]Calcium has atomic number 20. Calculate how its electrons are distributed in the shells. Show your working.
Question 377
5 marks · Easy
Answer and see the solution →This question is about deducing and representing electronic configurations of atoms using diagrams.
(a)[1 mark]Give the electronic configuration (using numbers) for the element with atomic number 10.
(b)[2 marks]Draw a diagram showing the arrangement of electrons in this atom, using shells and dots (•) for electrons.
(c)[2 marks]Explain why this arrangement is stable.
Question 378
6 marks · Normal
Answer and see the solution →This question is about electronic configurations, the periodic table, and how elements are classified as metals or non-metals.
(a)Element J has the electronic configuration 2,8,7.
State:
(i)[2 marks]The group number and period number of element J.
(ii)[1 mark]Whether element J is a metal or a non-metal.
(b)Element K is in Group 1 and Period 3 of the periodic table.
State:
(i)[2 marks]The electronic configuration of element K.
(ii)[1 mark]Whether the oxide of element K is likely to be acidic or basic.
Question 379
6 marks · Normal
Answer and see the solution →This question is about the relationship between electronic configuration, position in the Periodic Table, and chemical behaviour.
(a)[2 marks]State why all the elements in Group 2 have similar chemical reactions.
(b)Helium and argon are both found in Group 0 (noble gases) of the Periodic Table.
(i)[1 mark]State the electronic configuration of argon.
(ii)[2 marks]Explain why the elements in Group 0 are so unreactive.
(c)[1 mark]Iron (Fe) and sulfur (S) are both in Period 4. Based on their position in the Periodic Table, state which is the metal and which is the non-metal.
Question 380
6 marks · Normal
Answer and see the solution →This question is about explaining group trends and the inertness of Group 0 elements using the idea of electronic configuration.
(a)[2 marks]State how the electronic configuration of chlorine is related to its position in the Periodic Table.
(b)[2 marks]Explain why all the elements in Group 1 react similarly when placed in water.
(c)[2 marks]Group 0 (the noble gases) are found at the far right of the Periodic Table.
Explain why the noble gases are so unreactive.