Chemistry Unit 2 Revision Questions

Revision Questions based on the Edexcel GCSE chemistry specification for 2014

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C2: Discovering chemistry
Topic 1 ­ Atomic structure and the periodic table
1. How did Mendeleev arrange the elements, and predict the existence of some
elements not then discovered?
2. In what position are metals and non metals on the periodic table?
3. What is the structure of an atom?
4. What is the nucleus of an atom compared to the overall size of it?
5. What is unique to each element?
6. What is the relative charge and relative mass of each part of the atom?
7. How many protons compared to electrons are there in each atom?
8. What do atomic number, mass number and relative atomic mass mean?
9. What is the arrangement of elements in the periodic table?
10. What does the existence of isotopes result in?
11. How can you calculate the relative atomic mass of an element from the relative
masses and abundance of its isotopes?
12. What are the rules of filling election shells?
13. What is the connection between the number of outer electrons and the position of
an element in the periodic table?
Topic 2 ­ Ionic compounds and analysis
1. What can atoms of different elements combine to form?
2. How are ionic bonds formed?
3. What is an ion?
4. How do ions in ionic compounds form?
5. What chooses the use of endings in the names of compounds?
6. What is the method of working out the formula of a compound?
7. What structure does an ionic compound have?
8. What are some properties of ionic substances sodium chloride and magnesium
9. What are the general rules which describe the solubility of common types of
substances in water?
10. What does the reaction of suitable reagents in solution form?
11. What method is needed to prepare a pure, dry sample of an insoluble salt?
12. How can you prepare an insoluble salt by precipitation
13. What are the solubility rules?
14. Why is the insoluble salt, barium sulphate, given as a `barium meal' to x-ray patients?
15. What are the tests that can take place to show different ions are present?
16. What did chemists use to detect the presence of very small amounts of elements
and what did this lead to?

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Topic 3 ­ Covalent compounds and separation techniques
1. What is a covalent bond?
2. What does covalent bonding result in?
3. How can you explain the formation of simple molecular, covalent substances using
dot and cross diagrams for hydrogen, hydrogen chloride, water, methane, oxygen
and carbon dioxide?
4. How can you classify different types of elements and compounds? ( including sodium
chloride, magnesium sulphate, hexane, liquid paraffin, silicon (IV) oxide, copper
sulphate and sucrose ( sugar)
5.…read more

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What are the properties and uses of noble gases?
17. What is the pattern in a physical property of the noble gases?
Topic 5 ­ Chemical reactions
1. What do you need to measure that accompany temperature changes?
2. What is an exothermic reaction?
3. What is an endothermic reaction?
4. What is the breaking of bonds known as? What is the making of bonds known as?
5. What is the overall heat energy change for a reaction?
6. (Draw and Interpret Graphs specification)
7.…read more


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