What are Metals?
Metals are elements that are generally hard, shiny, strong, and good conductors of heat and electricity.
Examples of Metals
- Iron (Fe)
- Copper (Cu)
- Aluminium (Al)
- Gold (Au)
- Silver (Ag)
What are Non-Metals?
Non-metals are elements that are generally soft, dull, and poor conductors of heat and electricity.
Examples of Non-Metals
- Oxygen (O)
- Nitrogen (N)
- Sulphur (S)
- Carbon (C)
- Phosphorus (P)
Difference Between Metals and Non-Metals
Comparison Table of Metals and Non-Metals
| Property | Metals | Non-Metals |
|---|---|---|
| Appearance | Lustrous (shiny) | Non-lustrous (dull) |
| Hardness | Generally hard | Generally soft |
| State | Mostly solids | Solids, liquids, or gases |
| Malleability | Can be beaten into sheets | Cannot be beaten into sheets |
| Ductility | Can be drawn into wires | Cannot be drawn into wires |
| Conductivity | Good conductors of heat and electricity | Poor conductors |
| Sonority | Produce sound when hit | Do not produce sound |
| Melting Point | Usually high | Usually low |
| Density | Generally high | Generally low |
| Nature of Oxides | Basic oxides | Acidic or neutral oxides |
Important Physical Properties of Metals
Lustrous Nature
Metals have a shiny surface called metallic lustre.
Example: Gold and silver shine brightly.
Malleability
Metals can be hammered into thin sheets.
Example: Aluminium foil.
Ductility
Metals can be drawn into wires.
Example: Copper wires used in electricity.
Conductivity
Metals conduct heat and electricity well.
Example: Iron pan becomes hot quickly on a stove.
Sonorous Nature
Metals produce ringing sound when struck.
Example: School bells are made of metals.
Important Physical Properties of Non-Metals
Non-Lustrous
Most non-metals are dull in appearance.
Example: Coal and sulphur.
Brittle Nature
Non-metals break easily when hammered.
Example: Sulphur breaks into powder.
Poor Conductors
Most non-metals do not conduct heat or electricity.
Example: Rubber and sulphur.
Non-Sonorous
Non-metals do not produce sound when hit.
Exceptions in Metals and Non-Metals
| Exception | Explanation |
|---|---|
| Mercury | A metal but liquid at room temperature |
| Sodium | A metal but soft and can be cut with a knife |
| Graphite | A non-metal but conducts electricity |
| Iodine | A non-metal with lustre |
Chemical Properties of Metals
Reaction with Oxygen
Metals react with oxygen to form metal oxides.
Example
2Mg + O_2 \rightarrow 2MgO
Magnesium reacts with oxygen to form magnesium oxide.
Reaction with Water
Some metals react with water to produce hydrogen gas.
Example
2Na + 2H_2O \rightarrow 2NaOH + H_2
Chemical Properties of Non-Metals
Reaction with Oxygen
Non-metals react with oxygen to form acidic oxides.
Example
C + O_2 \rightarrow CO_2
Carbon reacts with oxygen to form carbon dioxide.
Uses of Metals
| Metal | Uses |
|---|---|
| Iron | Construction and machinery |
| Copper | Electrical wires |
| Gold | Jewellery |
| Aluminium | Utensils and aircraft |
Uses of Non-Metals
| Non-Metal | Uses |
|---|---|
| Oxygen | Breathing |
| Nitrogen | Fertilizers |
| Carbon | Fuel and pencils |
| Chlorine | Water purification |
AI Image Prompt 2
File Name
uses-of-metals-and-nonmetals.png
Alt Text
Uses of metals and non-metals in daily life
Description
Illustration showing common uses of metals and non-metals in industries and daily activities.
AI Image Prompt
Design an educational poster showing daily life uses of metals and non-metals. Include iron bridges, copper wires, gold jewellery, oxygen cylinders, nitrogen fertilizers, and carbon pencils. Use bright school-friendly visuals, labeled diagrams, modern infographic style, and add “thebachchantop.com” branding. 16:9 aspect ratio.
Advantages of Metals
- Strong and durable
- Good conductors
- Useful in construction
- Easily shaped into tools and wires
Advantages of Non-Metals
- Essential for life
- Used in medicines and fertilizers
- Useful in water purification
- Important in chemical industries
Key Points to Remember
- Metals are usually shiny, hard, and conductive.
- Non-metals are generally dull and poor conductors.
- Metals are malleable and ductile.
- Non-metals are brittle.
- Graphite is a non-metal that conducts electricity.
- Mercury is the only liquid metal at room temperature.
Practice Questions
Very Short Answer Questions
1. What are metals?
Answer: Metals are elements that are generally hard, shiny, and good conductors of heat and electricity.
2. Name two non-metals.
Answer: Oxygen and sulphur.
3. Which metal is liquid at room temperature?
Answer: Mercury.
4. Which non-metal conducts electricity?
Answer: Graphite.
5. What is malleability?
Answer: The property of being beaten into thin sheets is called malleability.
Short Answer Questions
1. Write any four differences between metals and non-metals.
Answer:
| Metals | Non-Metals |
|---|---|
| Shiny | Dull |
| Good conductors | Poor conductors |
| Malleable | Brittle |
| Ductile | Non-ductile |
2. Why is copper used in electric wires?
Answer: Copper is a good conductor of electricity and is ductile, so it can be drawn into wires.
3. Why are bells made of metals?
Answer: Metals are sonorous and produce sound when struck.
Fill in the Blanks
- Metals are good conductors of ________.
Answer: electricity - Non-metals are generally ________ in appearance.
Answer: dull - ________ is the only liquid metal at room temperature.
Answer: Mercury - Metals can be drawn into wires due to ________.
Answer: ductility - Graphite is a non-metal that conducts ________.
Answer: electricity
Multiple Choice Questions (MCQs)
1. Which of the following is a metal?
A. Oxygen
B. Sulphur
C. Iron
D. Carbon
Answer: C. Iron
2. Which property allows metals to be made into sheets?
A. Ductility
B. Malleability
C. Brittleness
D. Sonority
Answer: B. Malleability
3. Which non-metal conducts electricity?
A. Oxygen
B. Sulphur
C. Graphite
D. Nitrogen
Answer: C. Graphite
4. Which metal is liquid at room temperature?
A. Iron
B. Copper
C. Mercury
D. Gold
Answer: C. Mercury
5. Which of the following is a non-metal?
A. Aluminium
B. Copper
C. Carbon
D. Silver
Answer: C. Carbon
6. Metals are generally ________ conductors of electricity.
A. poor
B. good
C. weak
D. slow
Answer: B. good
7. Which property makes metals produce sound?
A. Conductivity
B. Malleability
C. Sonority
D. Brittleness
Answer: C. Sonority
8. Which gas is essential for breathing?
A. Nitrogen
B. Oxygen
C. Hydrogen
D. Carbon dioxide
Answer: B. Oxygen
9. Non-metals are generally ________.
A. shiny
B. hard
C. ductile
D. brittle
Answer: D. brittle
10. Which metal is used in electrical wiring?
A. Sulphur
B. Carbon
C. Copper
D. Phosphorus
Answer: C. Copper
Conclusion
Metals and non-metals differ in many physical and chemical properties. Metals are strong, shiny, and conductive, while non-metals are generally dull and poor conductors. Both are extremely important in daily life and industrial applications. Understanding their properties helps students build a strong foundation in science according to NCERT concepts.
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