5. Non-Metals are Generally Soft
(except diamond which is extremely hard non-metal). Most of the solid non-metals are quite soft. They can be easily cut with a knife. For example, sulphur and phosphorus are solid non-metals which are quite soft and can be easily cut with a knife. Only one non-metal carbon (in the form of diamond) is very hard. In fact, diamond (which is an allotropic form of carbon) is the hardest natural substance known.
Notes
Matter in Our Surroundings - Notes
1. The Case of a Liquid Solute Dissolved in a Liquid Solvent
Show Notes
2. 11. Metals Usually Have a Silver or Grey Colour
Show Notes
5. 3. Non-Metals are Bad Conductors of Heat and Electricity.
Show Notes
9. To Study the Properties of a Colloid
Show Notes
12. 7. Non-Metals may be Solid, Liquid or Gases at the Room Temperature.
Show Notes
14. Separation Of Mixture Of a Solid And a Liquids
Show Notes
16. 1. Separation by a Suitable Solvent
Show Notes
18. 6. Metals are Usually Strong. They Have High Tensile Strength.
Show Notes
19. To Separate a Mixture of Alcohol and Water
Show Notes
21. 6. Non-Metals are Not Strong. They Have Low Tensile Strength.
Show Notes
22. To Study the Properties of a Compound of Iron and Sulphur
Show Notes
25. To Study the Properties of a Solution
Show Notes
28. Separation of Mixture Of Two Solids
Show Notes
29. 3. Metals are Good Conductors of Heat and Electricity.
Show Notes
30. 11. Non-Metals Have Many Different Colours.
Show Notes
32. Chemical Formula for daily use material
Show Notes
34. To Separate the Salt-Water Mixture (or Salt-Solution)
Show Notes
44. 7. Metals are Solids at the Room Temperature
Show Notes
46. 4. Metals are Lustrous (or Shiny), and can be Polished.
Show Notes
