Questions and Answers
What is the property called when metals, in their pure state, have a shining surface?
Metallic lustre
What activity involves trying to cut small pieces of iron, copper, aluminium, and magnesium with a sharp knife?
Activity 3.2
What metal should be handled with care and dried by pressing between the folds of a filter paper before attempting to cut it with a knife?
Sodium
What is the purpose of rubbing the surface of metal samples with sandpaper in Activity 3.1?
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Which metal is not specifically mentioned as a sample for the activities?
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Study Notes
Metal Properties
- Metals, in their pure state, have a shining surface due to their high reflectivity, a property known as lustre.
Metal Cutting Activity
- Cutting small pieces of iron, copper, aluminium, and magnesium with a sharp knife is an activity to demonstrate their ductility.
Metal Handling
- Magnesium should be handled with care and dried by pressing between the folds of a filter paper before attempting to cut it with a knife to prevent it from igniting.
Metal Sample Preparation
- Rubbing the surface of metal samples with sandpaper is done to clean and remove any oxide layers, allowing for a fresh surface.
Metal Samples
- Sodium is not specifically mentioned as a sample for the activities.
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