Activity 3.7 Class 10 Science

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.

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. Electric circuit

   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

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