Starter quiz
- What is an element?
- a substance made from two or more different types of atoms bonded together
- a substance made from one type of atom only. ✓
- a substance made from different types of atoms mixed together
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- Which of these is a common property of metals?
- Brittle
- Insulator of heat
- Shiny ✓
- Poor conductor of electricity
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- Most non-metals are in the ______ state at room temperature.
- 'gas' ✓
- Where are metals typically located on the periodic table?
- Top right
- Bottom left
- Left side and centre ✓
- Only in the middle rows
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- Which symbol suggests there may be a fire risk/hazard?
- Match the property of the substance to its potential use.
- Good electrical conductor⇔Electrical wiring ✓
- Good thermal insulator⇔Jackets and coats ✓
- Flammable⇔Fuel ✓
- Shiny⇔Jewellery ✓
Exit quiz
- What does a hazard symbol on a substance indicate?
- The substance is safe to use.
- The substance is a metalloid.
- The substance has certain risks associated with it. ✓
- The substance is a metal.
- The substance is a non-metal.
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- Which of the following is a characteristic of metalloids?
- They all conduct electricity as well as metals.
- They are all solid at room temperature. ✓
- They have properties of both metals and non-metals. ✓
- They are all gases at room temperature.
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- Boron (B) is an example of a metalloid. Astatine (As) is sometimes classed as a metalloid. Give the elemental symbol of another metalloid.
- 'Si' ✓
What one word can be used to give the meaning of this hazard symbol?- 'corrosive' ✓
- A hazard symbol is used to show...
- a potential source of harm. ✓
- a high risk of an accident.
- a low risk of an accident.
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- Which of the following hazard symbols shows that a substance is very bad for the environment, and if swallowed could kill you or other organisms that consume it?
Worksheet
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Presentation
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Lesson Details
Key learning points
- Hazard symbols are used to decribe the dangers of substances.
- Each element has its own distinct properties.
- Metalloid elements have some properties of metals and some properties of non-metals.
Common misconception
Elements cannot have metal and non-metal properties.
Introduction of the metalloids and discussion of their properties.
Keywords
Hazard - A danger associated with a substance.
Metalloid - An element that shares some properties with metals and some properties with non-metals.
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