Starter quiz
- True or false? Most elements are metals.
- True ✓
- False
- An ______ is an atom, or group of atoms, with a positive or negative charge.
- 'ion' ✓
- Which of the following are examples of physical properties of a substance?
- melting point ✓
- pH
- reaction with oxygen
- thermal conductivity ✓
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- Which of the following statements about metals are true?
- Metals form negative ions.
- Metals are good electrical conductors. ✓
- All metals are solid at room temperature.
- Most metals have high melting points. ✓
-
- A compound is made of two or more different ______ chemically bonded together.
- 'elements' ✓
- Place these prefixes in order of size from the largest to the smallest.
- 1⇔giga-
- 2⇔mega-
- 3⇔kilo-
- 4⇔centi-
- 5⇔milli-
- 6⇔micro-
- 7⇔nano-
Exit quiz
- Match the following terms to the correct definition.
- malleable⇔Can be hammered or pressed into shape without breaking. ✓
- ductile⇔Can be drawn into a wire. ✓
- delocalised⇔Describes electrons free to move through the structure. ✓
- conductor⇔Substance that allows charge or energy to flow through it. ✓
- A metallic bond is the strong electrostatic force of attraction between the ______ and the delocalised electrons.
- 'metal ions' ✓
- Which of the following statements describe the structure of a metal?
- Regular structure of positive ions. ✓
- A sea of delocalised electrons. ✓
- More negative than positive charges.
- Negative metal ions.
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- Mercury is a metal that is liquid at room temperature. What does this tell you about the properties of mercury?
- It is ductile.
- It has a low melting point. ✓
- It is malleable.
- It conducts electricity.
-
- True or false? The individual atoms of a metal have the same physical properties of the whole metal.
- True
- False ✓
- Metals are good thermal conductors because ...
- they contain delocalised electrons. ✓
- they contain metal ions.
- they are good electrical conductors.
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Worksheet
Presentation
Video
Lesson Details
Key learning points
- Metals are good electrical conductors and good thermal conductors.
- Metals can be stretched into wires, or bent/hammered into different shapes.
- Individual atoms do not have the physical properties of the substances that contain them.
- Metallic structures consist of positive ions and free–moving outer shell electrons.
- Electrostatic forces of attraction between ions and free electrons bind them all together in a giant metallic structure.
Common misconception
A metal is an individual atom. The property of a metal atom is the same as the bulk material. Pupils get confused between the attractive forces in the metal atoms and the metallic bond.
Reinforce the idea that atoms are tiny and not visible to the naked eye. The material we know as metal is many millions of atoms joined together. Revisit the structure of the atoms before introducing the idea of metallic bonding and giant structure.
Keywords
Malleable - A malleable substance can be hammered or pressed into shape without breaking.
Ductile - A ductile substance has the ability to be drawn into a wire.
Delocalised - Electrons are said to be delocalised when they are free to move through the structure of a metal and can carry an electrical current.
Conductor - A conductor is a substance that allows charge or energy to flow through it easily due to the presence of delocalised electrons.
Forces of attraction - A force of attraction refers to the strength of the pull between two objects either due to their mass, their charge or the presence of magnetic poles.