3. Metals and Non-metals
Elements can be classified as metals and non-metals based on their physical and chemical properties. Metals exhibit characteristics such as metallic luster, malleability, ductility, and good conductivity of heat and electricity, while non-metals display the opposite properties. The chapter extensively discusses the reactivity series of metals, their extraction, and prevention of corrosion, along with distinguishing features of ionic compounds.
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What we have learnt
- Elements can be classified as metals and non-metals.
- Metals are lustrous, malleable, ductile, and good conductors of heat and electricity.
- Non-metals are neither malleable nor ductile and are generally poor conductors.
Key Concepts
- -- Metallic Lustre
- The shiny appearance of metals in their pure state.
- -- Malleability
- The ability of a metal to be beaten into thin sheets.
- -- Ductility
- The ability of a metal to be drawn into thin wires.
- -- Amphoteric Oxides
- Metal oxides that exhibit both basic and acidic properties, such as aluminum oxide.
- -- Reactivity Series
- A list of metals arranged in the order of their decreasing activities.
- -- Ionic Compounds
- Compounds formed by the transfer of electrons from metals to non-metals, resulting in the formation of positively and negatively charged ions.
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