Question 1 Name one non-metal which conduct electricity?
Question 2 Name one non-metal which have shiny surface?
Question 3 Name one non-metal which is hard?
Question 4 Name one non-metal having high melting point?
Question 5 Why graphite is used in making electrodes?
Question 6 Name one non-metal which is brittle?
Question 7 Name one non-metal which has low melting point?
For Ex:Carbon,sulphur,Phosphorus,Silicon,hydrogen,Oxygen,Chlorine,Bromine, Iodine,Helium Etc.
Non-Metals are elements which form negative ions by gaining electrons.They are known as electronegative elements because they can form negative ions by gaining electrons.
There are 22 non-metals.
1)Non-metals are not malleable and non-ductile.
They can neither be hammered into thin sheets nor drawn into thin wire.
They are brittle means break into pieces when hammered or stretched.
2)They do not conduct heat and electricity
This is because they have no free electrons.
C(in the form of graphite)is the only non-metal which is a good conductor of heat and electricity and therefore it is used in making electrodes.
3)They are not lustrous:They are dull.
Iodine is the only non-metal which is lustrous.
4)They are generally soft except diamond(hard)
5)They are not strong:They can be easily broken.
6)Non-metals are solid,liquid or gases at the room temperature.
Carbon,Sulphur,Phosphorus are solid.
Bromine is a liquid.
Hydrogen,oxygen,nitrogen and chlorine are liquid.
7)They have low melting and boiling point except diamond.
8)They are non-sonorous.
9)They have low densities.
10)They have different colours.