IGCSE CHEMISTRY 0620 LESSON 10 EXPLANATION

Lesson 10

The Periodic Table
Core
• Describe the Periodic Table as a method of classifying elements and its use to predict properties of elements

9.2 Periodic trends

• Describe the change from metallic to non- metallic character across a period

• Describe and explain the relationship between Group number, number of outer shell electrons and metallic/non-metallic character

9.3 Group properties

Core Supplement

• Describe lithium, sodium and potassium in Group I as a collection of relatively soft metals showing a trend in melting point, density and reaction with water
• Predict the properties of other elements in Group I, given data, where appropriate
• Describe the halogens, chlorine, bromine and iodine in Group VII, as a collection of diatomic non-metals showing a trend in colour and density and state their reaction with other halide ions
• Predict the properties of other elements in Group VII, given data where appropriate

• Identify trends in Groups, given information about the elements concerned

9.4 Transition elements

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Core Supplement

• Describe the transition elements as a collection of metals having high densities, high melting points and forming coloured compounds, and which, as elements and compounds, often act as catalysts

• Know that transition elements have variable oxidation states







END OF PART 2



PART 3