Study Notes
Metals are elements that make up about three-quarters of the naturally occurring elements on Earth. They have distinct physical and chemical properties that make them useful in various applications.
- Metal — an element that is typically hard, shiny, malleable, ductile, and a good conductor of electricity and heat. Example: Iron is a metal used in construction due to its strength.
- Alloy — a material made by combining two or more metals, or a metal with another element, to enhance properties. Example: Steel is an alloy of iron and carbon, known for its strength and durability.
- Malleable — the ability of a metal to be hammered or rolled into thin sheets without breaking. Example: Gold is highly malleable and can be shaped into thin sheets for jewelry.
- Ductile — the ability of a metal to be drawn into wires. Example: Copper is ductile and used in electrical wiring.
- Sonorous — the property of metals to produce a ringing sound when struck. Example: Bells are made from metals because they are sonorous.
Exam Tips
Key Definitions to Remember
- Metal
- Alloy
- Malleable
- Ductile
- Sonorous
Common Confusions
- Confusing metals with non-metals based on appearance.
- Assuming all metals are equally conductive.
Typical Exam Questions
- What is an alloy? An alloy is a material made by combining two or more metals, or a metal with another element.
- Why are metals good conductors of electricity? Metals are good conductors because they have free electrons that can move and carry charge.
- What happens when you hit a metal? It makes a ringing sound because metals are sonorous.
What Examiners Usually Test
- Differences between metals and non-metals.
- Properties of metals like malleability and ductility.
- Examples of alloys and their uses.