In this activity we test and compare physical properties of non-metals using the
same methods as used for metals in activity 3.1 to activity 3.6. In the next activity 3.8, we will discuss the nature of oxides of metals and non-metals.
Aim of the activity
To study the physical properties of non-metals
Material Required
1. Samples of carbon, sulphur and iodine
2. Sandpaper
3. Sharp knife
4. Hammer
5. Candle or spirit lamp
6. Electriccircuit
7. Clamp stand, pin, wax
Procedure
We will perform the activities as we performed for metals in the pervious
activities.
1. We observe the type of surface of non-metals to check dullness or brightness.
2. Try to cut with knife to check the hardness.
3. Hammer the samples to check the malleability.
4. Draw into wires to check ductility.
5. Heat the samples to test the thermal conductivity.
6. Connect to electrical circuit to test electrical conductivity
7. Tap to check sonority
Observation
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Explanation
Non-metals are different in physical properties from metals.
Conclusion
This activity demonstrates the physical properties of non-metals.
Frequently Asked Questions
1. Do all non-metals conduct electricity?
Answer
Most non-metals do not conduct electricity but graphite is a good conductor of electricity.
2. Are non-metals malleable or ductile?
Answer
Non-metals are brittle in nature; they break when hammered or stretched.
3. Why is graphite good conductor of electricity?
Answer
Graphite is an allotrope of carbon, it has free electron so it is good
conductor of electricity.
4. Name the non-metal which has shiny appearance.
Answer
Bromine
All Activities Chapter 3 Metals and Non-Metals
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1 |
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2 |
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3 |
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4 |
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5 |
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6 |
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7 |
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8 |
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9 |
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10 |
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11 |
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12 |
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13 |
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14 |